1Gut and Liver, Murdoch Childrens Research Institute, Melbourne, VIC Australia
2Centre for MEGA Epidemiology, the University of Melbourne, Melbourne, VIC, Australia
3Department of Paediatrics, the University of Melbourne, Melbourne, VIC, Australia
4Department of Gastroenterology, The Royal Children's Hospital, Melbourne, VIC, Australia
5Bruce Lefroy Centre for Genetic Health Research, Murdoch Childrens Research Institute, Melbourne, VIC, Australia
6Department of Epidemiology, University of California, Irvine, CA
7Victorian Cervical Cytology Registry, Melbourne, VIC, Australia
8Queensland Institute of Medical Research, Brisbane QLD, Australia
9Department of Pathology, University of Melbourne, Melbourne, VIC, Australia
10Department of Gastroenterology, Fremantle Hospital, Fremantle, WA, Australia
11School of Medicine and Pharmacology, University of Western Australia, Perth, WA, Australia
12Western Australian Institute of Medical Research, Perth, WA, Australia
13University of Queensland, Brisbane, QLD, Australia
14Cancer Epidemiology Centre, The Cancer Council Victoria, Melbourne, VIC Australia
Murdoch Childrens Research Institute, The Royal Children's Hospital, Flemington Road, Parkville, VIC 3052, Australia===
Received July 15, 2009
Accepted November 15, 2009
