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Cumulative meta‐analysis (largest to smallest size study). Studies included in this analysis are Valerio et al,10 Heresi et al,11 Kovacs et al,5 Suzuki et al,12 Maron et al,3 Takahashi et al,13 Douschan et al,4 Assad et al,2 Abramson et al,14 Kjaergaard et al,15 Shalaby et al,16 Lam et al,17 Damy et al,18 Cabrita et al,19 and Choudhary et al.20 CI indicates confidence interval; MH, Mantel‐Haenszel; PH, pulmonary hypertension.
