Authors: S Horton; T Sanghvi; M Phillips; J Fiedler; R Perez-Escamilla; C Lutter; A Rivera; A M Segall-Correa Journal: Health Policy Plan Date: 1996-06 Impact factor: 3.344
Authors: A L Morrow; M L Guerrero; J Shults; J J Calva; C Lutter; J Bravo; G Ruiz-Palacios; R C Morrow; F D Butterfoss Journal: Lancet Date: 1999-04-10 Impact factor: 79.321