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. 2018 Mar 14;8(3):e019656. doi: 10.1136/bmjopen-2017-019656

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Hospital admissions for studies at their longest follow-up period. Filled squares represent the risk difference for individual studies at the longest reported follow-up. The boxes are proportional to the weight of each study and the lines represent their 95% CI. The filled diamond represents the pooled risk difference. Weights are from random effects analysis. CR, cardiac rehabilitation.