[1] Guys & St ThomasNHS Fdn Trust, Harefield Hosp, Cardiothorac Surg, London, England
[2] Univ Hosp Birmingham NHS Fdn Trust DC, Major Trauma Serv, Birmingham, England
[3] Univ Perpetual Help Syst Data, Jonelta Fdn Sch Med, Med, Las Pinas, Philippines
[4] Mayo Hosp, Internal Med, Lahore, Pakistan
[5] All India Inst Med Sci, Community & Family Med, Jodhpur, India
[6] Northwestern Univ, Radiol, Lahore, Pakistan
[7] Rajiv Gandhi Univ Hlth Sci, St Johns Med Coll Hosp, Med & Surg, Bengaluru, India
[8] Univ San Martin Porres, Med, Lima, Peru
[9] Fatima Jinnah Med Univ, Community Med, Lahore, Pakistan
[10] Shalamar Med & Dent Coll, Internal Med, Lahore, Pakistan
[11] Cairo Univ, Gen Surg, Cairo, Egypt