[1] Dow Univ Hlth Sci, Karachi, Pakistan
[2] Jinnah Sindh Med Univ, Karachi, Pakistan
[3] CMH Lahore Med Coll, Lahore, Pakistan
[4] Liaquat Coll Med & Dent, Karachi, Pakistan
[5] Damascus Univ, Damascus, Syria
[6] St Marys Med Grp, Penwortham, Preston, England
[7] LSU Shreveport, Shreveport, LA USA
[8] Wayne State Univ, Detroit, MI USA
[9] Brooklyn Hosp Ctr, Brooklyn, NY USA
[10] Valley Hlth Syst, Paramus, NJ USA
[11] Chittagong Med Coll, Chittagong, Bangladesh
[12] Chittagong Med Coll, Dept Med, Chittagong, Bangladesh