Thongkan, T., T. Pitakteerabundit, and N.- ak Wiboonkhwan. “Does Pyloric-Ring Resection in Pancreaticoduodenectomy Prevent Delayed Gastric Emptying?”. Journal of Health Science and Medical Research, vol. 39, no. 4, June 2021, pp. 303-12, doi:10.31584/jhsmr.2021786.