*Department of Paediatric Medicine, Gastroenterology Service
†Department of Paediatric Surgery
‡Department of Radiology, KK Children's and Women's Hospital, Singapore.
Address correspondence and reprint requests to Dr Christina Ong, KK Women's and Children's Hospital, Department of Paediatrics, Level 3, Children's Tower, 100 Bukit Timah Road, Singapore 229899 (e-mail: Christina.Ong@kkh.com.sg).
Received 4 July, 2012
Accepted 23 July, 2012
The authors report no conflicts of interest.