The Liver Research Center;
Department of Medicine;
Rhode Island Hospital and Brown Medical School;
Providence;
Rhode Island;
USA and Kinderklinik der Johannes-Gutenberg-Universitt;
Mainz;
Germany;
Kinderklinik der Johannes-Gutenberg-Universitt;
Mainz;
Germany;
Zentrum für Kinder-und Jugendmedizin;
HELIOS Klinikum;
Wuppertal;
Witten-Herdecke-University;
Germany;