Zahid Ullah, M., Shah, S. A., Khan, Z. A. and Irshad, K. (2011) “Transthoracic Heller’s Myotomy for Achalasia of Cardia Experience with 28 Patients”, Journal of Postgraduate Medical Institute, 12(1). Available at: https://www.jpmi.org.pk/index.php/jpmi/article/view/601 (Accessed: 3 October 2024).