Syed Abbas Ali Shah , Awais Ali Khan , Najam Hussain , Huma Aslam ; Naveed Abbas, Atta Ul Aleem Khalid. (2014). Diagnostic Accuracy of Serology Testing for Helicobacter Pylori in Perforated Peptic Ulcer. Journal of Rawalpindi Medical College, 18(2). Retrieved from http://journalrmc.com/index.php/JRMC/article/view/353