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