We searched MEDLINE, EMBASE, and Cochrane Central Register of Controlled Trials until November 30, 2020. 
MEDLINE
We searched MEDLINE, EMBASE, and Cochrane Central Register of Controlled Trials until November 30, 2020. 
EMBASE
We searched MEDLINE, EMBASE, and Cochrane Central Register of Controlled Trials until November 30, 2020. 
Cochrane Central Register of Controlled Trials