| Cliniques universitaires de Bruxelles – Hôpital Erasme | Belgia | Brussel | Claudine Heinrichs |
| Cliniques universitaires Saint-Luc | Belgia | Brussel | Dominique Maiter |
| UZ Brussels | Belgia | Brussel | Inge Gies |
| UZ Leuven | Belgia | Leuven | Kristina Casteels |
| Centre Hospitalier Universitaire de Liège | Belgia | Liege | Albert Beckers |
| Ghent University Hospital | Belgium | Ghent | Martine Cools |
| USHATE „ACAD IVAN Penchev” | Bulgaria | Sofia | Sabina Zaharieva |
| MHAT „Sveta Marina” | Bulgaria | Varna | Violeta Iotova |
| University Hospital Motol | Czech Republic | Prague | Jan Lebl |
| Aarhus University Hospital | Danemarca | Aarhus | Claus H. Gravholt |
| Copenhagen University Hospital, Rigshospitalet | Danemarca | Copenhagen | Anders Juul |
| Tartu University Hospital | Estonia | Tartu | Vallo Tillmann |
| Assistance Publique – Consortium Pitie Salpêtrière Hospital, Necker Enfants Malades Hospital, Institut Mutualiste Montsouris – Rare Reproductive Endocrinology and Gynaecology Diseases (PGR) | France | Paris | Philippe Touraine |
| Assistance Publique – Hôpitaux de Marseille | Franța | Marseille | Thierry Brue |
| CHU Angers | Franța | Angers | Patrice Rodien |
| Assistance Publique – Consortium Cochin, Robert Debré, Necker, St Antoine, La Pitié Salpétrière, Trousseau University Hospitals | Franța | Paris | Jerome Bertherat |
| Assistance Publique – Consortium Pitie Salpêtrière – French Reference Centre for Prader-Willi Syndrome | Franța | Paris | Christine Poitou |
| Hôpital Bicêtre | Franța | Paris | Philippe Chanson |
| Hôpital Universitaire Necker – Enfants malades | Franța | Paris | Michel Polak |
| CHU Toulouse | Franța | Toulouse | Maithe Tauber |
| University Hospital Aachen | Germania | Aachen | Thomas Eggermann |
| Charité Universitätsmedizin Berlin | Germania | Berlin | Joachim Spranger |
| University Hospital Essen – Center for Rare Endocrine Diseases | Germania | Essen | Dagmar Fuehrer |
| Hannoversche Kinderheilanstalt, Diabetes Centre for Children and Adolescents | Germania | Hannover | Thomas Danne |
| Universitätsklinikum Schleswig-Holstein | Germania | Lubeck | Olaf Hiort |
| Otto-von-Guericke University, Med. Faculty – Central German Network for Rare diseases | Germania | Magdeburg | Klaus Mohnike |
| University Medical Center Mainz | Germania | Mainz | Dirk Prawitt |
| University Hospital Marburg | Germania | Marburg | Frederik Verburg |
| Ludwig-Maximilian-University Munich | Germania | Munchen | Nicole Reisch |
| Universitätsklinikum Münster | Germania | Munster | Julia Rohayem |
| University Hospital Würzburg | Germania | Wuerzburg | Martin Fassnacht |
| Azienda Ospedaliera Sant’Orsola Malpighi | Italia | Bologna | Alessandra Cassio |
| Meyer Children’s Hospital Florence | Italia | Florence | Sonia Toni |
| University Hospital Florence | Italia | Florence | Csilla Krausz |
| IRCCS A.O.U San Martino – Genova – (IT5) | Italia | Genua | Diego Ferone |
| Ospedale San Raffaele | Italia | Milan | Gianni Russo |
| Istituto Auxologigo Italiano – Istituto di Ricovero e Cura a Carattere Scientifico | Italia | Milano | Luca Persani |
| Azienda Ospedaliera Universitaria „Federico II”, Napoli | Italia | Napels | Annamaria Colao |
| Azienda Ospedaliera di Padova (AOP) | Italia | Padova | Carla Scaroni |
| Azienda Ospedaliera Universitaria Pisana – Obesity Centre, Endocrinology Unit | Italia | Pisa | Ferruccio Santini |
| Azienda Ospedaliero Universitaria Città della Salute e della Scienza di Torino | Italia | Turin | Ezio Ghigo |
| Hospital of Lithuanian University of Health Sciences Kauno Klinikos | Lituania | Kaunas | Rasa Verkausiene |
| Centre Hospitalier de Luxembourg | Luxemburg | Luxemburg | Michael Witsch |
| Máxima Medisch Centrum | Netherlands | Veldhoven | Harm Haak |
| Maria Sklodowska-Curie National Research Institute of Oncology (MSCNRIO) | Polonia | Gliwice | Jolanta Krajewska |
| Public Pediatric Teaching Hospital | Polonia | Warsaw | Agnieszka Szypowska |
| APDP – Diabetes Portugal | Portugalia | Lisbon | João Raposo |
| University Hospitals Birmingham – NHS Foundation Trust | Regatul Unit | Birmingham | Neil Gittoes |
| University Hospitals Bristol – NHS Foundation Trust | Regatul Unit | Bristol | Liz Crowne |
| NHS Greater Glasgow and Clyde Board | Regatul Unit | Glasgow | Faisal Ahmed |
| Alder Hey Children’s Hospital – NHS Foundation Trust | Regatul Unit | Liverpool | Mohammed Didi |
| Barts Health – NHS Foundation Trust | Regatul Unit | London | Marta Korbonits |
| Great Ormond Street Hospital/UCLH – NHS Foundation Trust | Regatul Unit | London | Mehul Dattani |
| Central Manchester University Hospitals – NHS Foundation Trust | Regatul Unit | Manchester | Peter Clayton |
| University Hospital Southampton – NHS Foundation Trust | Regatul Unit | Southampton | Justin Davies |
| Královské Vinohrady University Hospital in Prague | Republica Cehă | Prague | Ludmila Brunerova |
| Spitalul clinica de individual „Prof. Dr. Alexandru Obregia” | România | Bucharest | Dana Craiu |
| Institute of Oncology „Prof dr. Ion Chiricuta” CLUJ NAPOCA | România | Cluj-Napoca | Doina Piciu |
| University Medical Centre Ljubljana | Slovenia | Ljubljana | Tadej Battelino |
| Hospital Sant Joan de Déu Barcelona | Spania | Barcelona | Roque Cardona-Hernandez |
| Hospital Universitari Vall d’Hebron | Spania | Barcelona | Diego Yeste |
| Hospital Universitario Cruces | Spania | Bilbao | Sonia Gaztambide |
| Karolinska University Hospital | Suedia | Stockholm | Anna Nordenström |
| Amsterdam-UMC, locația AMC | Țările de Jos | Amsterdam | Eric Fliers |
| University Medical Center Groningen | Țările de Jos | Groningen | Thera Links |
| Leiden University Medical Center | Țările de Jos | Leiden | Nienke Biermasz |
| Maastricht University Medical Center – Center for Thyroid Carcinoma | Țările de Jos | Maastricht | Bas Havekes |
| Radboud University Nijmegen Medical Center – inclusiv Amalia’s children Hospital | Țările de Jos | Nijmegen | Hedi Claahsen |
| Erasmus MC: University Medical Center Rotterdam | Țările de Jos | Rotterdam | Robin Peeters |
| University Medical Center Utrecht – Dept of Endocrine Oncology | Țările de Jos | Utrecht | Gerlof Valk |
| Semmelweis University | Ungaria | Budapest | Miklos Toth |