[1] Jinnah Med & Dent Coll, Dept Neurosurg & Neurol, Karachi, Pakistan
[2] Dow Med Coll, Dept Neurosurg & Neurol, Karachi, Pakistan
[3] King Edward Med Univ, Dept Neurosurg, Lahore, Pakistan
[4] Jinan Univ, Dept Neurosurg, Guangzhou, Peoples R China
[5] Univ Minnesota, Med Sch, Minneapolis, MN 55455 USA
[6] Zagazig Univ, Coll Human Med, Zagazig, Egypt
[7] Univ Portsmouth, Sch Pharm & Biomed Sci, Portsmouth, England
[8] Virginia Commonwealth Univ, Dept Neurol, Richmond, VA USA
[9] Raiganj Govt Med Coll & Hosp, Dept Surg, Raiganj, W Bengal, India