Implementation research for public sector mental health care scale-up (SMART-DAPPER): a sequential multiple, assignment randomized trial (SMART) of non-specialist-delivered psychotherapy and/or medication for major depressive disorder and posttraumatic stress disorder (DAPPER) integrated with outpatient care clinics at a county hospital in Kenya - Levy, Rachel; Mathai, Muthoni; Chatterjee, Purba; Ongeri, Linnet; Njuguna, Simon; Onyango, Dickens; Akena, Dickens; Rota, Grace; Otieno, Ammon; Neylan, Thomas C.; Lukwata, Hafsa; Kahn, James G.; et al. (BMC Psychiatry, 2019)