*Department of Paediatric Gastroenterology, University Medical Center, Utrecht
†Department of Paediatrics, Gelre Hospitals, Apeldoorn
‡Department of Paediatric Gastroenterology, VU University Medical Centre, Amsterdam
§Department of Paediatrics, Deventer Hospital, Deventer
||Department of Pathology, VU University Medical Centre
¶Department of Gastroenterology and Hepatology, VU University Medical Centre, Amsterdam, The Netherlands.
Address correspondence and reprint requests to Amani Mubarak, Department of Paediatric Gastroenterology, Wilhelmina Children's Hospital, KE 01.144.3, PO Box 85090, 3508 AB, Utrecht, The Netherlands (e-mail: A.Mubarak@umcutrecht.nl).
Received 20 September, 2010
Accepted 27 January, 2011
The authors report no conflicts of interest.