Ahmad, Sajjad, Arshad Zafar, Mukhtar Ahmad, Aamir Ghafoor, Ehtisham Malik, Adnan Ali, Umair Ahmed, and Saleem Qazi. 2005. “ACCURACY OF SURGEON-PERFORMED ABDOMINAL UTRASOUND FOR GALLSTONES”. Journal of Ayub Medical College Abbottabad 17 (1). https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/4124.