Department of Gastroenterology/ Hepatology, Lyell McEwin Hospital, Haydown Road, Elizabeth Vale, South Australia 5112, Australia. Flinders Centre for Epidemiology and Biostatistics, Flinders University, GPO Box 2100, Adelaide, South Australia 5001, Australia. Department of Gastroenterology/ Hepatology, Lyell McEwin Hospital, Haydown Road, Elizabeth Vale, South Australia 5112, Australia; Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, South Australia 5005, Australia. Department of Gastroenterology/ Hepatology, Lyell McEwin Hospital, Haydown Road, Elizabeth Vale, South Australia 5112, Australia; Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, South Australia 5005, Australia. Electronic address: asif.chinnaratha@sa.gov.au.