<qa>  What is the ATRQ?Measures that will be utilized in this study can be divided into two groups. One group is observer rated and the other group is subject rated. The observer-rated instruments include the Antidepressant Treatment Response Questionnaire ATRQ, Montgomery-Åsberg Depression Rating Scale MADRS and the Hamilton Rating Scale for Depression HAMD 17. Subject-Rated measures include the Inventory of Depressive Symptomatology-Self Report Version IDS-SR and the Client Satisfaction Questionnaire CSQ 8. 