[1] Westmead Hosp, Dept Gastroenterol, Sydney, NSW, Australia
[2] Westmead Hosp, Dept Hepatol, Sydney, NSW, Australia
[3] Princess Alexandra Hosp, Dept Gastroenterol, Brisbane, Qld 4102, Australia
[4] Princess Alexandra Hosp, Dept Hepatol, Brisbane, Qld 4102, Australia