A multi-country study of the economic burden of dengue fever based on patient-specific field surveys in Burkina Faso, Kenya, and Cambodia by Lee, J, Mogasale, V, Lim, J, Ly, S, Lee, K, Sorn, S, Andia, E, Carabali, M, Namkung, S, Lim, S, Ridde, V, Njenga, S, Yaro, S, Yoon, I