XieJJiangMLinYDengHLiL. Effect of alprostadil on the prevention of contrast-induced nephropathy: a meta-analysis of 36 randomized controlled trials. Angiology. 2019;70(7):594–612.
2.
HigginsJPTGreenS, eds. Cochrane Handbook for Systematic Reviews of Interventions Version 5.1.0 [updated March 2011]. The Cochrane Collaboration; 2011. www.handbook.cochrane.org. Accessed June 30, 2019.
3.
SennSJ. Overstating the evidence: double counting in meta-analysis and related problems. BMC Med Res Methodol. 2009;9:10.