Jessica M Gross, Martha F Rogers, Ilya Teplinskiy, Elizabeth Oywer, David Wambua, Andrew Kamenju, John Arudo, Patricia L Riley, Melinda Higgins, Chris Rakuom, Rose Kiriinya, Agnes Waudo
Health Serv Res. 2011 August; 46(4): 1300–1318. doi: 10.1111/j.1475-6773.2011.01251.x