Preventive drainage and anastomotic leakage after colorectal surgery

Table 1 Literature search strategy

Database	Search build	Results
PubMed	#1: “Colorectal” OR “rectal” OR “rectum” [MeSH] OR “Colon”[MeSH]; #2: “Drainage”[Mesh] OR “Drainage, Postural” OR “Manual Lymphatic Drainage” OR “Negative-Pressure Wound Therapy” OR “Paracentesis” OR “Negative Pressure Wound Therapy” OR “draining” OR “Suction” OR “drain”; #1 AND #2	3183
Web of Science	#1: ((((((((KP=(Drainage)) OR KP=(Drainage, Postural)) OR KP=(Manual Lymphatic Drainage)) OR KP=(Negative-Pressure Wound Therapy)) OR KP=(Negative Pressure Wound Therapy)) OR KP=(Paracentesis)) OR KP=(draining)) OR KP=(Suction)) ORKP=(drain) and Preprint Citation Index(Exclude -Database); #2: (((KP=(Colorectal)) OR KP=(rectal)) OR KP=(rectum)) OR KP=(Colon) and Preprint Citation Index(Exclude-Database); #1 AND #2	413