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Ansari SH, Baig N, Shamsi TS, Saif-ur-Rehman, Ansari ZH, Behar Z, Perveen K, Erum S, Bukhari ZR, Khan MT, Akbar M.Ansari SH, et al. Among authors: khan mt.J Pak Med Assoc. 2012 Dec;62(12):1314-7.J Pak Med Assoc. 2012.PMID: 23866481