Impact and Process Evaluation of Integrated Community and Clinic-Based HIV-1 Control: A Cluster-Randomised Trial in Eastern Zimbabwe - Gregson, S; Adamson, S; Papaya, S; Mundondo, J; Nyamukapa, CA; Mason, PR; Garnett, GP; Chandiwana, SK; Foster, G; Anderson, RM (PLOS Medicine, 2007)