A total of 93 boys were enrolled and randomized (Ox, n=46 or Pl, n=47), and 84 met study criteria. Participant demographics were 75% Caucasian, 1% African-American, 9% Hispanic, 5% Asian-American, and 10% Other. There were 12 dropouts (7 Ox, 5 Pl) (14% dropout rate). Reasons for study discontinuation included lack of interest in all 12. None withdrew because of adverse events or safety reasons.