Author's reply: A randomized trial of Mogen clamp versus Plastibell for neonatal male circumcision in Botswana.

TRIAL REGISTRATION AND THE PUBLISHED ARTICLE The published article describes a 2-arm trial of 300 infants comparing the Mogen clamp (n = 153) with the Plastibell device (n = 147). However, the trial registration documents on ClinicalTrials. gov (NCT00971958) has, since June 24, 2011, described a 3-arm trial with the AccuCirc device added as a third arm, making a total sample size of 450. The trial registration also described the total “anticipated enrolment” initially as 1000, later increased to 1250, and currently records an “achieved enrolment” of 1020. Can the authors clarify which sample size was planned, was the trial registration document erroneous, and most importantly is there a third arm still unpublished?