[1] Gajju Khan Med Coll, Dept Community Med, Shah Mansur, Pakistan
[2] WHO Country Off, World Hlth Representat, Safat, Kuwait
[3] Qatar Univ, Dept Populat Med, Doha, Qatar
[4] Khyber Med Coll, Dept Community Med & Publ Hlth, Peshawar, Pakistan
[5] Peshawar Univ, Near Irnum Hosp, Khyber Med Coll, Dept Community Med & Publ Hlth, Peshawar 25120, Pakistan