| Medical University of Vienna,Center for Disorders of Sex Development / Dpt. of Pediatrics1. | Austria | Vienna | 7 | Stefan Riedl, |
| Medical University of Vienna,Center for Rare Diabetes and Congenital Hyperinsulinism / Dpt. of Pediatrics1. | Austria | Vienna | 3 | Birgit Rami-Merhar |
| Medical University of Vienna,Center for Rare Endocrinologic Diseases / Dpt. of Internal Medicine III,1. | Austria | Vienna | 126 | Greisa Vila, Sabina Baumgartner-Parzer |
| Klinikum Wels-Grieskirchen,Center for Pediatric Endocrinology / Dpt. of Pediatrics1. | Austria | Wels | 12567 | Walter Bonfig |
| Cliniques universitaires Saint-Luc | Belgium | Brussel | 1345678 | Dominique Maiter, Orsalia Alexopoulou |
| Hôpital Universitaire de Bruxelles (HUDERF-Erasme) | Belgium | Brussel | 125678 | Aglaia Kyrilli, Cécile Brachet |
| UZ Brussels | Belgium | Brussel | 12345678 | Inge Gies, David Unuane, Heini Kanervo |
| UZ Antwerpen | Belgium | Edegem | 124 | Christophe De Block, Dirk Ysebaert |
| Ghent University Hospital | Belgium | Ghent | 247 | Martine Cools, Guy T'Sjoen |
| UZ Leuven | Belgium | Leuven | 3 | Kristina Casteels, Ann Mertens |
| Centre Hospitalier Universitaire de Liège | Belgium | Liege | 46 | Albert Beckers, Patrick Petrossians |
| USHATE “ACAD IVAN Penchev” | Bulgaria | Sofia | 46 | Sabina Zaharieva, Atanaska Elenkova |
| UMHAT “Sveta Marina” (Varna) | Bulgaria | Varna | 3567 | Violeta Iotova, Sonya Galcheva |
| University Hospital Centre Sestre Milosrdnice University Department of Oncology & Nuclear Medicine Centre of Reference for thyroid disease1. | Croatia | Zagreb | 8 | Mario Zovak, Dijana Zadravec |
| Vuk Vrhovac University Clinic for Diabetes, Endocrinology and Metabolic Diseases, Merkur University Hospital1. | Croatia | Zagreb | 3 | Dario Rahelic |
| Department of Molecular Genetics, Function and Therapy, The Cyprus Institute of Neurology and Genetics1. | Cyprus | Nicosia | 167 | Leonidas Phylactou, Vassos Neocleous |
| General University Hospital in Prague | Czechia | Prague | 1268 | Michal Krsek, Vaclav Hana, |
| University Hospital Motol | Czechia | Prague | 1235678 | Zdenek Sumnik, Ondrej Soucek |
| Aarhus University Hospital | Denmark | Aarhus | 12345678 | Claus H. Gravholt, Kirstine Stochholm |
| Copenhagen University Hospital, Rigshospitalet | Denmark | Copenhagen | 145678 | Anders Juul, Lise Aksglæde |
| Odense Universitetshospital | Denmark | Odense | 1234567 | Henrik Christesen, Marianne Skovsager Andersen |
| Tartu University Hospital | Estonia | Tartu | 235678 | Vallo Tillmann, Vallo Volke |
| HUS Helsinki University Hospital, Hospital District of Helsinki and Uusimaa (EndoERN_FIN) | Finland | Helsinki | 123467 | Camilla Schalin-Jäntti, Päivi Miettinen, Marianna Viukari |
| Assistance Publique – Hôpitaux de Marseille | France | Marseille | 46 | Thierry Brue, Frederique Albarel |
| CHU Angers | France | Angers | 578 | Patrice Rodien, Regis Coutant |
| Hospices Civils de Lyon | France | Lyon | 467 | Gérald Raverot, Valeska Bidault |
| Assistance Publique – Consortium Cochin, Robert Debré, Necker, St Antoine, La Pitié Salpétrière, Trousseau University Hospitals | France | Paris | 1345678 | Jérôme Bertherat, Juliane Léger |
| Assistance Publique – Consortium Pitie Salpêtrière – French Reference Centre for Prader-Willi Syndrome | France | Paris | 5 | Christine Poitou |
| Hôpital Bicêtre | France | Paris | 267 | Philippe Chanson, Claire Bouvattier |
| Reference centre for rare diseases of calcium and phosphate-HEGP | France | Paris | 2 | Pascal Houillier, Rosa Vargas |
| CHU Toulouse | France | Toulouse | 5 | Maithe Tauber, G Diene |
| University Hospital Aachen | Germany | Aachen | 5 | Thomas Eggermann, Miriam Elbracht |
| Charité Universitätsmedizin Berlin | Germany | Berlin | 12345678 | Peter Kühnen, Knut Mai |
| Katholisches Klinikum Bochum | Germany | Bochum | 278 | Corinna Grasemann, Martin Munteanu |
| Universitaetsklinikum Duesseldorf, AöR, Klinik für Allgemeine Pädiatrie, Neonatologie und Kinderkardiologie | Germany | Düsseldorf | 3 | Thomas Meissner, Sebastian Kummer |
| University Hospital Essen – Center for Rare Endocrine Diseases | Germany | Essen | 124568 | Dagmar Fuehrer, Nicole Unger |
| Hannoversche Kinderheilanstalt, Diabetes Centre for Children and Adolescents | Germany | Hannover | 3 | Felix Reschke, Olga Kordonouri |
| Universitätsklinikum Schleswig-Holstein | Germany | Lubeck | 2478 | Olaf Hiort, Paul-Martin Holterus |
| Otto-von-Guericke University, Med. Faculty – Central German Network for Rare diseases | Germany | Magdeburg | 3 | Klaus Mohnike, Martin Zenker |
| University Medical Center Mainz | Germany | Mainz | 8 | Dirk Prawitt, Joachim Pohlenz |
| Ludwig-Maximilian-University Munich | Germany | Munchen | 1245678 | Nicole Reisch, Martin Reincke |
| Universitätsklinikum Tübingen | Germany | Tübingen | 56 | Gerhard Binder, Roland Schweizer |
| Universitätsklinikum Ulm (Ulm University Medical Center) | Germany | Ulm | 1357 | Martin Wabitsch, Julia von Schnurbein |
| University Hospital Würzburg | Germany | Wuerzburg | 1268 | Martin Fassnacht, Stefanie Hahner |
| Aghia Sophia Children’s Hospital | Greece | Athens | 123568 | Christina Kanaka-Gantenbein, Antonis Voutetakis |
| Evangelismos General Hospital | Greece | Athens | 1468 | Dimitra-Argyro Vassiliadi, Georgia Ntali |
| General Hospital of Athens “LAIKO” | Greece | Athens | 12 | Eva Kassi, Gregory Kaltsas |
| Semmelweis University | Hungary | Budapest | 1246 | Miklos Toth, Attila Patocs |
| Beaumont Hospital & Children’s Health Ireland | Ireland | Dublin | 12345678 | Mark Sherlock, Susan O'Connell |
| IRCCS Azienda Ospedaliero-Universitaria di Bologna | Italy | Bologna | 12345678 | Alessandra Gambineri, Federico Baronio |
| Azienda Ospedaliero Universitaria di Ferrara | Italy | Ferrara | 148 | Maria Chiara Zatelli, Maria Rosaria Ambrosio |
| Meyer Children’s Hospital Florence | Italy | Florence | 1235678 | Sonia Toni, Barbara Piccini |
| University Hospital Florence | Italy | Florence | 12467 | Letizia Canu, Csilla Gabriella Krausz |
| IRCCS Istituto Giannina Gaslini, Genova | Italy | Genova | 35678 | Mohamad Maghnie, Giuseppe D'Annunzio |
| IRCCS Ospedale Policlinico San Martino – Genova – Italy | Italy | Genova | 6 | Diego Ferone, Federico Gatto |
| AOU policlinico “G.Martino” Messina | Italy | Messina | 12568 | Salvatore Cannavò, Francesco Ferraù |
| Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milano | Italy | Milan | 25678 | Giovanna Mantovani, Claudia Giavoli |
| Istituto Auxologico Italiano – Istituto di Ricovero e Cura a Carattere Scientifico | Italy | Milan | 145678 | Luca Persani, Marco Bonomi |
| Ospedale San Raffaele | Italy | Milan | 12345678 | Gianni Russo, Maria Cristina Vigone |
| AOU di Modena | Italy | Modena | 12678 | Vincenzo Rochira, Sara De Vincentis |
| Antonio Cardarelli Hospital- Azienda Ospedaliera di rilievo nazionale | Italy | Naples | 4 | Francesco Scavuzzo, Davide De Brasi |
| AOU Università degli Studi della Campania “Luigi Vanvitelli”, Napoli | Italy | Naples | 1357 | Katherine Esposito, Emanuele Miraglia Del Giudice |
| Azienda Ospedaliera Universitaria “Federico II”, Napoli | Italy | Naples | 12345678 | Annamaria Colao, Mariacarolina Salerno |
| Azienda Ospedaliera di Padova (AOP) | Italy | Padova | 12345678 | Pietro Maffei, Filippo Ceccato, Laura Guazzarotti |
| Obesity and Lipodystrophy Centre, Endocrinology Unit, Azienda Ospedaliero Universitaria Pisana | Italy | Pisa | 3 | Ferruccio Santini, Giovanni Ceccarini |
| Azienda Unità Sanitaria Locale-IRCCS of Reggio Emilia | Italy | Reggio Emilia | 1458 | Chiara Grasselli, Chiara Sartori |
| Azienda Ospedaliero-Universitaria Policlinico Umberto I | Italy | Roma | 12345678 | Andrea Lenzi, Andrea Isidori |
| Azienda Ospedaliero Universitaria Città della Salute e della Scienza di Torino | Italy | Turin | 12345678 | Ezio Ghigo, Roberta Giordano |
| AOUI di Verona | Italy | Verona | 135678 | Franco Antoniazzi, Paolo Cavarzere |
| Childrens Clinical University Hospital1. | Latvia | Rīga | 12357 | Iveta Dzivite-Krisane |
| Pauls Stradins Clinical University Hospital1. | Latvia | Riga | 124568 | Lauma Jaunozola |
| Hospital of Lithuanian University of Health Sciences Kauno Klinikos | Lithuania | Kaunas | 1235678 | Rasa Verkausiene, Birute Zilaitene |
| Centre Hospitalier de Luxembourg | Luxembourg | Luxemburg | 3 | Marianne Becker, Ulrike Schierloh |
| Mater Dei Hospital1. | Malta | Valletta | 4 | James Clark, Carol Fenech |
| Amsterdam UMC | Netherlands | Amsterdam | 1678 | Paul van Trotsenburg, Alberto Pereira |
| University Medical Center Groningen | Netherlands | Groningen | 14678 | Thera Links, Melanie van der Klauw |
| Leiden University Medical Center | Netherlands | Leiden | 12345678 | Nienke Biermasz, Natasha Appelman-Dijkstra |
| Maastricht University Medical Center – Center for Thyroid Carcinoma | Netherlands | Maastricht | 8 | Bas Havekes, Marleen Kars |
| Radboud University Nijmegen Medical Center – including Amalia’s children Hospital | Netherlands | Nijmegen | 1678 | Hedi Claahsen, Henri Timmers |
| Erasmus MC: University Medical Center Rotterdam | Netherlands | Rotterdam | 1245678 | Erica van den Akker, Edward Visser |
| University Medical Center Utrecht – Dept of Endocrine Oncology | Netherlands | Utrecht | 48 | Gerlof Valk, Hanneke van Santen |
| Máxima Medisch Centrum | Netherlands | Veldhoven | 1 | Karin Blijdorp, Pleun Wouters - van Poppel |
| Helse Bergen HF, Haukeland University Hospital1. | Norway | Bergen | 12 | Eyestein Husebye, Helge Ræder |
| Oslo University Hospital HF1. | Norway | Oslo | 2456 | Jens Bollerslev, Ansgar Heck |
| Maria Sklodowska-Curie National Research Institute of Oncology (MSCNRIO) | Poland | Gliwice | 8 | Jolanta Krajewska, Barbara Jarzab |
| Saint John Paul II Upper Silesian Child Health Centre, Public Clinical Hospital no.6 of the Medical University of Silesia in Katowice | Poland | Katowice | 7 | Aneta Gawlik, Aleksandra Antosz |
| Karol Jonscher’s Clinical Hospital of Poznan University of Medical Sciences | Poland | Poznan | 7 | Marek Niedziela, Monika Obara-Moszynska |
| Public Pediatric Teaching Hospital | Poland | Warsaw | 3 | Agnieszka Szypowska |
| APDP – Diabetes Portugal | Portugal | Lisbon | 3 | João Raposo, Ana Carolina Neves |
| Centro Hospitalar de Lisboa Norte, EPE | Portugal | Lisbon | 6 | Ema Lacerda Nobre, Claudia Faria, |
| Centro Hospitalar Universitario de São João, EPE | Portugal | Porto | 68 | Elisabete Rodrigues, Davide Carvalho |
| Spitalul Clinic de Psihiatrie “Prof. dr. Alexandru Obregia” | Romania | Bucharest | 8 | Dana Craiu, Diana Barca |
| Institute of Oncology “Prof dr. Ion Chiricuta” CLUJ NAPOCA | Romania | Cluj-Napoca | 8 | Doina Piciu, Patriciu Achimas-Cadariu |
| Spitalul Clinic de Urgenta pentru Copii, Cluj-Napoca | Romania | Cluj-Napoca | 17 | Simona Bucerzan, Camelia Alkhzouz |
| Spitalul Clinic Judetean de Urgenta Cluj (Cluj County Emergency Clinical Hospital) | Romania | Cluj-Napoca | 18 | Carmen Emanuela Georgescu, Cristina Alina Silaghi |
| National Institute of Children’s Diseases, Dept. of Paediatrics of Medical Faculty Comenius University1. | Slovakia | Bratislava | 57 | Ludmila Kostalova, Eva Vitariusova |
| University Hospital Martin, Dept of Paediatrics of Jessenius Medical Faculty Comenius University1. | Slovakia | Martin | 1235678 | Jarmila Vojtková, Alena Szokeová |
| University Medical Centre Ljubljana | Slovenia | Ljubljana | 1235678 | Primoz Kotnik, Jasna Šuput Omladič |
| Fundacio de Gestio Sanitaria Hospital de la Santa Creu i Sant Pau | Spain | Barcelona | 6 | Anna Aulinas, Queralt Asla |
| Hospital Sant Joan de Déu Barcelona | Spain | Barcelona | 35 | Roque Cardona-Hernandez, Marta Ramon-Krauel |
| Hospital Universitari Vall d’Hebron | Spain | Barcelona | 124678 | Maria Clemente, Ariadna Campos |
| Hospital Universitario Cruces | Spain | Bilbao | 2346 | Sonia Gaztambide, Luis Castano |
| Complejo Hospitalario Regional Virgen del Rocío | Spain | Sevilla | 6 | Alfonso Soto Moreno, Eva María Venegas Moreno |
| Sahlgrenska University Hospital | Sweden | Gothenburg | 12345678 | Gudmundur Johannsson, Jovanna Dahlgren |
| Karolinska University Hospital | Sweden | Stockholm | 124567 | Anna Nordenström, Charlotte Höybye |
