[1] Birmingham Childrens Hosp, Birmingham, W Midlands, England
[2] Dept Pediat Hepatol, Madrid, Spain
[3] Clin Univ St Luc, B-1200 Brussels, Belgium
[4] Serv Gastroenterol Infantil, Madrid, Spain
[5] Univ Klinikum Rudolf Virchow, Berlin, Germany
[6] Osped Riuniti Bergamo, I-24100 Bergamo, Italy
[7] Univ Krankenhaus Eppendorf, Hamburg, Germany
[8] Serv Transplantat Hepat, Lyon, France
[9] Birmingham Childrens Hosp, Birmingham, W Midlands, England