Jenell Stewart, Kevin Oware, Deborah Donnell, Lauren R. Violette, Josephine Odoyo, Olusegun O. Soge, Caitlin W. Scoville, Victor Omollo, Felix O. Mogaka, Fredericka A. Sesay, R. Scott McClelland, Matthew Spinelli, Monica Gandhi, Elizabeth A. Bukusi, Jared M. Baeten, for the dPEP Kenya Study Team