Abro, Arshad Hussain, Irfan Zafar Haider, and Sarfraz Ahmad. 2011. “HELICOBACTER PYLORI INFECTION IN PATIENTS WITH CALCULAR CHOLECYSTITIS: A HOSPITAL BASED STUDY”. Journal of Ayub Medical College Abbottabad 23 (1):30-33. https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/2577.