Authors: Sodiomon B Sirima; Alfred B Tiono; Alphonse Ouédraogo; Amidou Diarra; André Lin Ouédraogo; Jean Baptiste Yaro; Espérance Ouédraogo; Adama Gansané; Edith C Bougouma; Amadou T Konaté; Youssouf Kaboré; Abdoulaye Traoré; Roma Chilengi; Chilengi Roma; Issiaka Soulama; Adrian J F Luty; Pierre Druilhe; Simon Cousens; Issa Nébié Journal: PLoS One Date: 2009-10-26 Impact factor: 3.240