Wong, P., D. Seyfi, K. Herba, and G. Falk. “Dysphagia and Oesophageal Dilation in Giant Hiatus Hernia: Angulation of the Gastro-Oesophageal Junction or Achalasia?”. International Surgery Journal, vol. 10, no. 10, Sept. 2023, pp. 1684-6, doi:10.18203/2349-2902.isj20232995.