[1] Sri Balaji Action Med Inst, Med, Delhi, India
[2] Ladoke Akintola Univ Technol, Pure & Appl Biol, Ogbomosho, Nigeria
[3] Stavropol State Med Univ, Gen Med, Stavropol, Russia
[4] Bahria Univ Med & Dent Coll, Med, Karachi, Pakistan
[5] Sir Syed Coll Med Sci, Med, Karachi, Pakistan
[6] Liaquat Univ Med & Hlth Sci, Med, Jamshoro, Pakistan
[7] Burjeel Hosp, Internal Med, Abu Dhabi, U Arab Emirates
[8] NMC Royal Family Med Ctr, Med, Abu Dhabi, U Arab Emirates
[9] Shaheed Mohtarma Benazir Bhutto Med Coll, Med, Karachi, Pakistan
[10] Ziauddin Univ, Med, Karachi, Pakistan
[11] Menoufia Univ, Med, Shibin Al Kawm, Egypt
[12] Paolo Procacci Fdn, Pain Med, Rome, Italy
[13] Dow Univ Hlth Sci, Internal Med Cardiol, Karachi, Pakistan
[14] Dow Univ Hlth Sci, Internal Med, Karachi, Pakistan
[15] Sanjay Gandhi Mem Hosp, Med, Delhi, India
[16] Khyber Teaching Hosp, Internal Med, Peshawar, Pakistan