功能性胃肠疾病位置及分类 XI Diseases of the digestive system:K20-K31 Diseases of oesophagus, stomach and duodenum :K30 Functional dyspepsia 功能性消化不良K55-K64 Other diseases of intestines 其他肠道疾病K58 Irritable bowel syndrome 肠易激综合征K59 Other functional intestinal disorders 其他功能性肠...