 Due to potential vacations, illnesses, and other events, the 24 treatments 16 for Phase 1 can occur over a 15 week period 10 for Phase 1, with no more than 2 sessions per week. Each child must participate in a minimum of 75 of the sessions 18 for Phase 2; 12 for Phase 1 to be included in the study. If a child misses sufficient sessions so that heshe is not able to meet the study criteria, treatment will be discontinued at that time. 