[1] Univ Manchester, Fac Med & Human Sci, Room G-907,Stopford Bldg,Oxford Rd, Manchester M13 9PT, Lancs, England
[2] Pakistan Inst Learning & Living, Karachi, Pakistan
[3] Dow Univ Hlth Sci, Karachi, Pakistan
[4] Abbasi Shaheed Hosp, Karachi, Pakistan
[5] Statsconsultancy Ltd, Amersham, England
[6] Camden & Islington NHS Fdn Trust, London, England
[7] Queens Univ, Kingston, ON, Canada