Cases were identified as patients over 18 years of age with a first - ever diagnosis of gastrointestinal bleeding 所有病例年龄大于18岁,并且首次诊断为胃肠道出血。
2.
However , drug ? drug interactions may lead to a greatly increased risk of gastrointestinal bleeding when these drugs are combined 然而,药物联合应用可能会大大增加胃肠道出血的风险。