Under-five mortality before and after implementation of the Liberia National Community Health Assistant (NCHA) program: A study protocol. oleh Dominik Jockers, Richard Ngafuan, Till Baernighausen, Albert Kessley, Emily E White, Avi Kenny, John Kraemer, John Geedeh, Jeffrey Rozelle, Leah Holmes, Hawa Obaje, Sylvester Wheh, Jon Pedersen, Mark J Siedner, Savior Mendin, Marion Subah, Lisa R Hirschhorn