According to the American College of Gastroenterology, approximately 19 million people have gastroesophageal reflux disease (GERD), which is caused by stomach content moving upward from the stomach into the esophagus.

• 据美国胃肠病学会报道，大约1900万人群患有胃食管返流疾病(GERD)，其主要由胃内容物从胃向上移至食道引起。