Met-analyses.
Tekkis
Paris P
PP
D003107:Colorectal Surgery; D013505:Digestive System Surgical Procedures / Q000009:adverse effects*; D017558:Elective Surgical Procedures / Q000009:adverse effects*; D006801:Humans; D015201:Meta-Analysis as Topic; D011300:Preoperative Care / Q000379:methods*