mean (SD) age, height, weight, and number of games played
of the control subjects were 25 (6) yr, 176.5 (7.9) cm, 76.8
(11.3) kg, and 110 (92) games. There were no significant
differences between groups for these variables assessed
using independent t-tests.
The study was approved by the University of Melbourne
Human Research Ethics Committee. All subjects provided
written informed consent.