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. 2014 Jul 29;2014(7):CD004695. doi: 10.1002/14651858.CD004695.pub3

11.9. Analysis.

11.9

Comparison 11: 20 ug ethinyl estradiol and 3 mg drospirenone, 28‐day cycle versus flexible regimen (28 to 124‐day cycle) for one year, Outcome 9: Mean spotting days in third reference period