TY - JOUR T1 - Rating the certainty in evidence in the absence of a single estimate of effect JF - Evidence Based Medicine JO - Evid Based Med DO - 10.1136/ebmed-2017-110668 SP - ebmed-2017-110668 AU - M Hassan Murad AU - Reem A Mustafa AU - Holger J Schünemann AU - Shahnaz Sultan AU - Nancy Santesso Y1 - 2017/03/20 UR - http://ebm.bmj.com/content/early/2017/03/20/ebmed-2017-110668.abstract N2 - ER -