早期ERCP与早期保守治疗重症急性胆源性胰腺炎的系统综述及Meta分析

表1 检索策略

数据库	检索策略
PubMed
	#1 severe acute biliary pancreatitis OR acute gallstone pancreatits OR acute necrotizing pancreatitis
	#2 ERCP OR endoscopic retrograde cholangiopancreatography OR papillotomy OR EST OR
	#3 randomized controlled trial
	#4 #1 AND #2 AND #3
CBM
	#1胆源性重症胰腺炎OR重症胆源性胰腺炎OR胆石性重症胰腺炎OR重症胆石性胰腺炎
	#2 ERCP OR EST OR 内镜 OR 逆行胰胆管造影 OR括约肌切开术
	#3随机
	#4 #1 AND #2 AND #3