[1] Postgrad Inst Med Educ & Res PGIMER, Dept Community Med, Chandigarh, India
[2] Postgrad Inst Med Educ & Res PGIMER, Sch Publ Hlth, Chandigarh, India
[3] Postgrad Inst Med Educ & Res PGIMER, Dept Obstet & Gynecol, Chandigarh, India
[4] Postgrad Inst Med Educ & Res PGIMER, Dept Biostat, Chandigarh, India
[5] Postgrad Inst Med Educ & Res PGIMER, Dept Gastroenterol, Chandigarh, India
[6] Postgrad Inst Med Educ & Res PGIMER, Dept Dietet, Chandigarh, India
[7] All India Inst Med Sci AIIMS, Dept Community & Family Med, Deoghar, Jharkhand, India