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Volume 75, Issue 6 , Pages 476-477 , June 2007

Erratum to “Letter to the Editor” [Contraception 74 (2006) 349–350]

Cycle length by cycle week of enrollment in ECP and comparison studies. Note: In this box and whisker plot, the line in the middle of each box is the median, the upper and lower edges of each box are

Cycle length by cycle week of enrollment in ECP and comparison studies. Note: In this box and whisker plot, the line in the middle of each box is the median, the upper and lower edges of each box are the 25th and 75th percentiles, respectively, and the upper and lower ends of the whiskers are the 5th and 95th percentiles, respectively.
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