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pathology Benefit (demonstrated or suggested) and harm      
atrial fibrillation

All results are NS for efficacy

inferior to no treatment in terms of Withdrawals due to adverse effects in Hohnloser, 1995

inferior to no treatment in terms of Withdrawals due to adverse effects in Juul-Moller, 1990

inferior to no treatment in terms of Withdrawals due to adverse effects in Sodermark, 1975

meta-analysis