<qa>  How many months of treatment will patients receive CAT only once a month?Participants are randomly assigned to CAT, Minimal Environmental Supports MES, or treatment as usual for 2 years. Participants receiving CAT will have a trained therapist make weekly visits to their home for 9 months. Over the following 3 months, the frequency of CAT visits will be slowly reduced to once a month. For the remaining 12 months of treatment, patients receive CAT only once a month. 