[1] Kempegowda Inst Med Sci, Dept Community Med, Bangalore, Karnataka, India
[2] Kasturba Med Coll & Hosp, Dept Community Med, Mangalore, India
[3] Manipal Acad Higher Educ, Fac Hlth Sci, Manipal, India
[4] SRM Med Coll Hosp & Res Ctr, Dept Community Med, Chennai, Tamil Nadu, India
[5] Bangalore Med Coll & Res Inst, Dept Community Med, Bangalore, Karnataka, India