. . . "Cochrane review" . . . "Cochrane Database Syst. Rev." . "1996" . . . . "Cochrane" . . "Cochrane Database of Systematic Reviews" . . . . "2018" . "Cochrane reviews" . . . . . . "Cochrane Library" . "1469-493X" . "7.755" . "The Cochrane Database of Systematic Reviews" . "Cochrane Library" . "Cochrane_Library#Contents" . . . "Cochrane Library review" . "The Cochrane Library" . "99039924" . "Cochrane Central Register of Controlled Trials (CENTRAL)" . . . "Cochrane Review" . "Cochrane_Library#The_Cochrane_Database_of_Systematic_Reviews" . "Cochrane Library#Contents" . . "2044-4702" . . . "Cochrane meta-analysis" . . . . . "Cochrane Systematic Review" . . .