Koyio, Lucina, Wil JM van der Sanden, Andre van der Ven, Nico Creugers, Matthias Merkx, and Jo Frencken. “Effect of Education of Primary Health Care Workers on HIV-Related Oral Lesions in Nairobi East District”. Journal of Public Health Research 1, no. 2 (April 30, 2012): e20. Accessed December 7, 2019. https://www.jphres.org/index.php/jphres/article/view/jphr.2012.e20.