Joanna RM Armstrong Schellenberg , Mwifadhi Mrisho , Fatuma Manzi , Kizito Shirima , Conrad Mbuya , Adiel K Mushi , Sosthenes Charles Ketende , Pedro L Alonso , Hassan Mshinda , Marcel Tanner and David Schellenberg
BMC Public Health 2008, 8:194doi:10.1186/1471-2458-8-194