Comparison 1. Primary outcomes.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 All‐cause mortality	2	211	Risk Ratio (M‐H, Random, 95% CI)	1.0 [0.14, 6.90]
2 Serious adverse event	1		Risk Ratio (M‐H, Random, 95% CI)	Totals not selected