Sustaining complex interventions in long-term care: a qualitative study of direct care staff and managers. - Colón-Emeric, Cathleen; Toles, Mark; Cary Jr., Michael P.; Batchelor-Murphy, Melissa; Yap, Tracey; Yuting Song; Hall, Rasheeda; Anderson, Amber; Burd, Andrew; Anderson, Ruth A.; Cary, Michael P Jr; Song, Yuting (Implementation Science, 2016)