[1] All India Inst Med Sci, Dept Gastroenterol & Human Nutr, Sri Aurobindo Marg, New Delhi 110029, Delhi, India
[2] Seth Gordhandas Sunderdas Med Coll & KEM Hosp, Dept Gastroenterol, Mumbai 400012, Maharashtra, India
[3] Sir HN Reliance Fdn Hosp, Dept Gastroenterol, Mumbai 400004, Maharashtra, India
[4] Sir HN Reliance Fdn Hosp, Dept Liver Transplant & HPB, Mumbai 400004, Maharashtra, India
[5] All India Inst Med Sci, Dept Gastroenterol, Patna 801507, Bihar, India
[6] All India Inst Med Sci, Natl Drug Dependence Treatment Ctr NDDTC, Biostat, New Delhi 110029, India
[7] All India Inst Med Sci, Dept Radiodiag, New Delhi 110029, India