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Ward Weistra 🔥

@wardweistra.nl
328 followers 709 following 124 posts

Clinical informaticist and PhD candidate computable guidelines at @iknl.nl, the Netherlands Comprehensive Cancer Organisation. Formerly: Product at Fire.ly and content lead #FHIR DevDays.com. 🎓 MSc Bioinformatics 🤸 Parkour

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Ward Weistra 🔥 @wardweistra.nl · 09/09/2026
2️⃣ Using CQL with FHIR Edition 3 is in open ballot through this Sunday (Sept 14th). Shared conformance for libraries and FHIR evaluation: hl7.org/fhir/uv/cql/... If you write or run clinical logic on FHIR, open the ballot before Sunday!
hl7.org
This page is part of the Using CQL with FHIR Implementation Guide (v3.0.0-ballot: STU 3 Ballot) based on FHIR (HL7® FHIR® Standard) R4. This version is a pre-release. The current official version is 2.0.0. For a full list of available versions, see the Directory of published versions
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Ward Weistra 🔥 @wardweistra.nl · 09/09/2026
Two things landed this summer that mark that maturity: 1️⃣ CQL Release 2 went STU (a standard for trial use) last month. Substantive new features, clarifications, no breaking changes: cql.hl7.org
cql.hl7.org
CQL Specification - Clinical Quality Language Specification v2.0.0
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Ward Weistra 🔥 @wardweistra.nl · 09/09/2026
#CQL is an open language for clinical logic. Quality measures. Decision support. Computable guidelines. Cohorts. Readable for authors, executable for systems. Older than the #FHIR boom. Not married to FHIR either. But most energy is on CQL with FHIR now, via big quality measurement efforts.
CQL on FHIR is in balloting now, CQL version 2 has been released last month as a standard for trial use.
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Ward Weistra 🔥 @wardweistra.nl · 03/09/2026
We're hiring a FHIR specialist at @iknl.nl. The job is to help the Netherlands Cancer Registry receive care data in FHIR + deliver it back out. Intake, validation, processing, APIs, all that fun stuff 🙂 32–36 hrs, Eindhoven/hybrid. Dutch. Apply by 20 Sept. vacatures.iknl.nl/vacaturebesc... #FHIR
vacatures.iknl.nl
Software developer/FHIR specialist
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Ward Weistra 🔥 @wardweistra.nl · 16/01/2026
Grateful to get regular invites from JAMIA to review and to be able to contribute to science in this way! #JAMIAOpen #JAMIA
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Ward Weistra 🔥 @wardweistra.nl · 13/01/2026
🚨 One week to go! Join our webinar: “Implementing the FHIR Community Process (FCP) with Simplifier.” 100+ registered already—clearly there’s demand for practical FCP guidance. If you create, validate, or govern FHIR IGs, don’t miss it. #FHIR #FCP #Interoperability fire.ly/webinar-impl...
An announcement of the FHIR Community Process webinar on January 20th, including the speakers Diego Kaminker, Mattias Colliander and Ward Weistra
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Ward Weistra 🔥 @wardweistra.nl · 01/12/2025
Yes, at least: @roelandluykx.bsky.social @joomak.bsky.social @rhondayf.bsky.social (virtually 💐) @myhealthmyhands.bsky.social @iknl.nl @patrickwerner.de ...
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Oliver Egger @oliveregger.bsky.social · 15/11/2025
Daniel Vreeman from HL7: Despite all the progress we've made in healthcare interoperability, too often, people still move faster and further than their health information. blog.hl7.org/building-the...
blog.hl7.org
Building the Standards Infrastructure for Healthcare AI: Lessons from the Interoperability Journey
Reflections from HL7 Chief AI Officer Dan Vreeman from ADAPT 2025 Conference - Building the Standards Infrastructure for Healthcare AI: Lessons from the Interoperability Journey
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Ward Weistra 🔥 @wardweistra.nl · 01/12/2025
Also here this week: @andrieshamster.bsky.social @fyrstain.bsky.social @hl7uk.bsky.social @hl7switzerland.bsky.social @chronaki.bsky.social @xia-eu-project.bsky.social @i2xproject.bsky.social @michaelstrubin.bsky.social 👀 Did I miss anyone?
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Ward Weistra 🔥 @wardweistra.nl · 01/12/2025
At the @hl7europe.bsky.social Working Group Meeting in Cologne this week. 🇪🇺 Here Giorgio explains how HL7 Europe is the third approved #FHIR Community Process participant. Want to learn more about the #FCP? See my recent article on it here 👉 www.linkedin.com/pulse/why-fc...
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HL7 Europe @hl7europe.bsky.social · 13/11/2025
We have published three new HL7 Europe #FHIR Implementation Guides designed for supporting the #EHDS: HL7 Base and Core FHIR IGs (STU) for FHIR release 4 and 5, and the HL7 Europe Extensions package. To learn more click here: 👉https://shorturl.at/xIDtO or come to our WGM in Cologne and join us.
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HL7 Europe @hl7europe.bsky.social · 16/09/2025
We’re thrilled to welcome you to Hospitals on #FHIR User Days 2025! Preview the just-released preliminary agenda and catch your first glimpse at keynotes, interactive sessions, real-life use cases and more that will shape the future of healthcare through FHIR and digital transformation practices.
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Ward Weistra 🔥 @wardweistra.nl · 18/09/2025
With additional resources in R6 we can slow down the release cycle of the core FHIR specifications, but we can still incubate resources for new data areas at their own pace. #FHIR #FMG
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Ward Weistra 🔥 @wardweistra.nl · 18/09/2025
A very preliminary list from the #HL7WGM in Pittsburgh right now on which #FHIR resources have been proposed to move out of the core specification with the R6 version and where they may go.
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Ward Weistra 🔥 @wardweistra.nl · 18/07/2025
Hey Dave! Firely and HL7 survey knowledgeable health IT specialists from as many countries as we can reach every year. That includes people at HL7 affiliates, partner organizations, MoH, etc. Here's a deeper explanation of the State of FHIR survey: fire.ly/blog/the-sta...
fire.ly
The State of FHIR in 2025: Growing adoption and evolving maturity
Discover the most important takeaways from the 2025 State of FHIR Survey exploring global FHIR adoption, regulation, and future trends.
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Ward Weistra 🔥 @wardweistra.nl · 18/07/2025
🌏 Based on the #StateofFHIR survey, we now have a summary for each country that participated for where they stand with FHIR adoption: simplifier.net/jurisdictions Go checkout the countries that you're familiar with and let me know if the summary is helpful! #FHIR #Interoperability
simplifier.net
SIMPLIFIER.NET
FHIR Registry
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Ward Weistra 🔥 @wardweistra.nl · 14/07/2025
The 2026 May working group meeting from HL7 International is coming to Rotterdam 🇳🇱 www.linkedin.com/posts/sticht... #HL7 #FHIR
linkedin.com
De Health Level Seven International May Working Group Meeting 2026 komt naar Rotterdam! | HL7 Nederland
De Health Level Seven International May Working Group Meeting 2026 komt naar Rotterdam! 16 t/m 22 mei zal de SS Rotterdam het kloppend hart van de HL7 Community zijn. Met natuurlijk ook veel aandacht...
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Centro Nacional en Sistemas de Información en Salud @censchile.bsky.social · 01/07/2025
🌐 ¡El informe internacional 2025 State of FHIR Survey Report reconoció a Chile por su compromiso con la IO clínica y la adopción del estándar FHIR! Revísalo en hl7chile.cl/wp-content/u... 🙌🏼 En CENS continuamos trabajando para que los sistemas de salud estén más conectados.
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Ward Weistra 🔥 @wardweistra.nl · 10/07/2025
This is one of the most insightful graphs in the #StateofFHIR report from this year, highlighting what are the most common use cases for #FHIR around the world! 💡 Many other insights you can find in the summary and full report here: fire.ly/blog/the-sta...
The most common use cases for FHIR from the 2025 State of FHIR report, as indicated by experts around the world.
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Ward Weistra 🔥 @wardweistra.nl · 24/06/2025
Maybe universal interoperability isn’t all it’s cracked up to be 😄 @xkcd.com xkcd.com/3105/ #Interoperability #FHIR
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Ward Weistra 🔥 @wardweistra.nl · 24/06/2025
🚀 Excited to announce the release of 𝗙𝗼𝗿𝗴𝗲 2025.1! Highlights: 👉 Element-level extensions (Obligation & Translation) and customizable extension visibility 👉 Precise control over what syncs to Simplifier Read more: simplifier.net/organization... #FHIR #DigitalHealth #Interoperability
simplifier.net
⭐ Forge 2025.1: Extensions on elements and controlling which files are synchronized - SIMPLIFIER.NET
FHIR Registry
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Florian Hehlen @zenwork.eurosky.social · 03/06/2025
AI and LLM integration are one big challenge in #digitalhealth that promises to unlock many things. Huge progress is happening but cost (time and money) are still a big hurdle to reach usable solutions. #fhirdevdays #fhir
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Ward Weistra 🔥 @wardweistra.nl · 02/06/2025
Ready for all the attendees to arrive tomorrow morning! #FHIRDevDays
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Ward Weistra 🔥 @wardweistra.nl · 20/05/2025
Join me for a tour through Amsterdam, showcasing the highlights for the #FHIRDevDays program in two weeks! 🌷 👉 4 days of 120+ sessions! 👉 8 amazing keynotes, incl. @drishitabarua.bsky.social @maxschrems.bsky.social @grahamegrieve.bsky.social 👉 All #FHIR experts in one place #Amsterdam750
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Ward Weistra 🔥 @wardweistra.nl · 19/05/2025
📅 Don't miss tomorrow's Simplifier Product Update Webinar! • New license plans & 60-day free Professional Plan trial • Online resource editor demo • Private FHIR packages • Latest updates to Simplifier, Forge & Firely Terminal 🔥 #FHIR #HealthIT #Interoperability us02web.zoom.us/webinar/regi...
us02web.zoom.us
Welcome! You are invited to join a webinar: What's new in Simplifier & Forge. After registering, you will receive a confirmation email about joining the webinar.
A webinar for all Simplifier.net customers, showcasing the latest developments in the two platforms, informing on the upcoming developments and a forum for Q&A and product suggestions.
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Ward Weistra 🔥 @wardweistra.nl · 15/05/2025
Simplifier.net is evolving! 🚀 Exciting changes June 1st for the #FHIR community! 👇 ✨ New 60-day FREE trial (Forge, Editors, QC)! ✨ FREE Trainer License + student vouchers! 📚 ✨ Show organizational affiliation & collaborate! 🤝 Making #Interoperability easier! 🔥 simplifier.net/organization...
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Ward Weistra 🔥 @wardweistra.nl · 14/05/2025
Are you missing some #FHIR in your feed? 🔥 I'm maintaining a list of already 36 experts from the HL7 community over here: go.bsky.app/3JcB4Td Follow them all at once to stimulate that #healthit #interop conversation! 💬
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Ward Weistra 🔥 @wardweistra.nl · 12/05/2025
My colleague Alexander Zautke gave an amazing presentation this morning on the #FHIR journey from AdapCare, from complying to regulation to wild innovation. He also gave a sneak peek of the upcoming #StateOfFHIR survey: FHIR is entering health it regulation everywhere 🐙 #HealthIT #Interop
Alexander presents a sneak peek of the State of FHIR Survey on data exchange regulation
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Ward Weistra 🔥 @wardweistra.nl · 12/05/2025
Was also inspired by seeing the AI based guide validation that Kereval demoed. See example output here: fhir-testing.gazelle-platform.net/examples It verifies softer requirements from the Best Practices IG and generates test cases based on the IG content. #HealthIT #Interoperability
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Ward Weistra 🔥 @wardweistra.nl · 12/05/2025
Time for some updates from the #HL7WGM in Madrid this week! 🇪🇸 Let's start with the Connectathon over this weekend. My main focus was the #EHDS track with @hl7europe.bsky.social and comparing multiple profiles side-by-side for compatibility. I hacked together a little application to make a start.
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Ward Weistra 🔥 @wardweistra.nl · 06/05/2025
Also focusing on: • Next FHIR version development with 𝗙𝗛𝗜𝗥 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝗚𝗿𝗼𝘂𝗽 & Infrastructure WG • Testing solutions at the 𝗘𝗨-𝗮-𝘁𝗵𝗼𝗻 📍 Will you be at the HL7 WGM in Madrid? DM me for coffee! ☕ #EHDS #HL7WGM #FHIR #Interoperability #HL7Europe #IHEEurope
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Ward Weistra 🔥 @wardweistra.nl · 06/05/2025
𝗛𝗲𝗮𝗱𝗶𝗻𝗴 𝘁𝗼 𝗠𝗮𝗱𝗿𝗶𝗱! 🇪🇸 Attending the HL7 International Working Group Meeting & FHIR Connectathon next week (May 10-16) — excited to help shape the future of health data interoperability. My focus areas: #EHDS developments, aligning #FHIR profiles across 🇪🇺 EU Member States with @hl7europe.bsky.social
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ICT&health @icthealth.nl · 05/05/2025
“AI isn’t the first step — data is.” Dr. Carina Vorisek stresses the need for FHIR, SNOMED and clean, structured data before AI can truly support healthcare. #Healthcare #AI #FHIR #SNOMED #digitalhealth #interoperability
icthealth.org
AI? Let’s first talk about FHIR, SNOMED, quality, and bias | ICT&health Global
Interoperability is foundational for AI in healthcare. Most AI applications are currently still siloed, developed, and deployed within individual institutions.
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Ward Weistra 🔥 @wardweistra.nl · 02/05/2025
📹 Just made a video breaking down the Forge vs FHIR Shorthand debate! 🔧 Whether you're team GUI or team code, choosing the right FHIR modeling tool matters. Check out my detailed analysis in the original article: www.linkedin.com/pulse/choosi... #FHIR #HealthIT #Interoperability #FSH
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Josh Mandel, MD @josh.mandel.md · 01/05/2025
New Perspective: The EHR Association's push to remove foundational data access is misguided & harmful for health innovation. www.linkedin.com/pulse/ehr-as...
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Ward Weistra 🔥 @wardweistra.nl · 01/05/2025
This is the #FHIR version you'll want to watch and plan for. R4B and R5 have seen adoption by newly started countries (it's the best version available after all), the big ones (🇺🇸🇩🇪🇳🇱...) indicated they're waiting for R6 to upgrade their specs' FHIR version again. confluence.hl7.org/spaces/FMG/p...
confluence.hl7.org
Release Plan for R6 - FHIR Management Group - Confluence
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Ward Weistra 🔥 @wardweistra.nl · 01/05/2025
FHIR version R6 is going to be the first big new normative release after the widely adopted R4. 🗳️ 3rd ballot release of R6 for the May working group meeting is available now: hl7.org/fhir/6.0.0-b... 🗓️ After that, first normative ballot in Jan 2026! #FHIR #Interop #HealthIT #HealthTech
hl7.org
Ballot-intro - FHIR v6.0.0-ballot3
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Ward Weistra 🔥 @wardweistra.nl · 29/04/2025
🗓️ June 3-6, 2025 📍Amsterdam Register by May 1 for early bird rates: www.devdays.com/registration... #FHIR #FHIRDevDays #DigitalPrivacy
devdays.com
Registration 2025 - FHIR DevDays
Registration Fees DevDays 2025  Category Early Bird Registration Regular Registration Paid by May 1, 2025 Paid after May 1, 2025 In person € 2.000 € 2.500 Students* € 1.000 € 1.300 All fees are in Eur...
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Ward Weistra 🔥 @wardweistra.nl · 29/04/2025
🔐 Privacy champion @maxschrems.bsky.social joins #FHIRDevDays 2025! The renowned digital rights activist behind landmark EU privacy cases & founder of @noyb.eu will explore the future of healthcare data privacy in our changing geopolitical landscape. Early bird ends May 1! 🐦 #FHIR #DigitalPrivacy
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Josh Mandel, MD @josh.mandel.md · 25/04/2025
What if, instead of pre-specifying every data field and every possible workflow step, we could enable conversations between capable systems? Prior auth and beyond! youtu.be/BRX7HUBlEqw?... www.linkedin.com/pulse/conver...
youtu.be
Live Demo: Conversational Interop for Prior Auth (LLMs, A2A, and MCP)
YouTube video by Josh Mandel
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Ward Weistra 🔥 @wardweistra.nl · 25/04/2025
Learn how this game-changing EU legislation will drive FHIR adoption across member states. Register by May 1st for early bird rates: devdays.com/registration... 🐦 #FHIR #FHIRDevDays
devdays.com
Registration 2025 - FHIR DevDays
Registration Fees DevDays 2025  Category Early Bird Registration Regular Registration Paid by May 1, 2025 Paid after May 1, 2025 In person € 2.000 € 2.500 Students* € 1.000 € 1.300 All fees are in Euros (EUR) and are exclusive… Continue reading →
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Ward Weistra 🔥 @wardweistra.nl · 25/04/2025
🇪🇺 Meet our EHDS experts at FHIR DevDays 2025! Itte Overing (ICTRecht) will decode the legal framework while Rutt Lindström (TEHIK) explores European FHIR Implementation Guides. #EHDS #FHIR @hl7europe.bsky.social
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Ward Weistra 🔥 @wardweistra.nl · 24/04/2025
🏥 Don't miss this unique perspective on WHO's global interoperability work and SMART Guidelines implementation. Join us June 3-6 in Amsterdam for both keynote and technical deep-dive! Early bird registration open until May 1st: www.devdays.com/registration... #FHIR #FHIRDevDays
devdays.com
Registration 2025 - FHIR DevDays
Registration Fees DevDays 2025  Category Early Bird Registration Regular Registration Paid by May 1, 2025 Paid after May 1, 2025 In person € 2.000 € 2.500 Students* € 1.000 € 1.300 All fees are in Euros (EUR) and are exclusive… Continue reading →
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Ward Weistra 🔥 @wardweistra.nl · 24/04/2025
🌍 Our second keynote speaker at FHIR DevDays 2025 is the @who.int's Carl Leitner! He'll showcase how FHIR and the International Patient Summary enable healthcare delivery to millions of Hajj pilgrims in Saudi Arabia 🇸🇦 #FHIRDevDays #FHIR #IPS
Carl Leitner of the World Health Organization is a keynote speaker at the FHIR DevDays conference
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Ward Weistra 🔥 @wardweistra.nl · 23/04/2025
Awesome, I've sent you a connection request! Can't wait
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Ward Weistra 🔥 @wardweistra.nl · 23/04/2025
🗓️ Join us June 3-6 in Amsterdam for this unique perspective from a doctor-turned-developer-turned-policymaker who helped accelerate FHIR adoption through the 21st Century Cures Act. Early bird registration open until May 1st! #FHIR #FHIRDevDays www.devdays.com/registration...
devdays.com
Registration 2025 - FHIR DevDays
Registration Fees DevDays 2025  Category Early Bird Registration Regular Registration Paid by May 1, 2025 Paid after May 1, 2025 In person € 2.000 € 2.500 Students* € 1.000 € 1.300 All fees are in Euros (EUR) and are exclusive… Continue reading →
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Ward Weistra 🔥 @wardweistra.nl · 23/04/2025
🎤 Excited to announce Donald Rucker as keynote speaker at #FHIRDevDays 2025! Former U.S. National Coordinator for Health IT and current Chief Strategy Officer at 1upHealth will share insights on "data beyond the EMR" and FHIR's role in high-compute healthcare.
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grahamegrieve.bsky.social @grahamegrieve.bsky.social · 22/04/2025
Lets not get carried away here
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Ward Weistra 🔥 @wardweistra.nl · 22/04/2025
But do get done by Acquired 😉 www.acquired.fm/episodes/epi... cc @acquiredfm.bsky.social
acquired.fm
Epic Systems (MyChart) | Acquired Podcast
The complete podcast (and transcript!) of the Epic Systems’ history and business strategy.
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Ward Weistra 🔥 @wardweistra.nl · 22/04/2025
Hey Rukshan, I'd love to try that actually! We need more tools like that. #CQL
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