[1] Org Panamericana Salud, Washington, DC 20037 USA
[2] Grp Estudios Mujer Rosario Castellanos, Oaxaca, Mexico
[3] Univ Peruana Cayetano Heredia, Lima, Peru
[4] Univ Tulane, Escuela Salud Publ & Med Trop, Nueva Orleans, LA USA
[5] Fundacao Oswaldo Cruz, INCQS,4365 BRASIL AV, BR-21045 Manguinho, RJ, Brazil
[6] Univ Costa Rica, Ctr Invest Cuidado Enfermeria & Salud, San Jose, Costa Rica
[7] Inst Med Trop Pedro Kouri, Havana, Cuba
[8] Acad Nacl Med, Cuauhtemoc, Mexico