1. Department of Child and Adolescent Psychiatry, Hokkaido University Hospital, Sapporo, Japan.
2. Kochi Medical School Department of Child and Adolescent Psychiatry, Kochi University, Kochi, Japan.
3. Department of Child Mental Health and Development, Toyama University Hospital, Toyama, Japan.
4. Department of Child Psychiatry, Chiba University Hospital, Chiba, Japan.
5. Mochida Pharmaceutical Co., LTD., Shinjuku-ku, Japan.