[1] Org Panamer Salud, Washington, DC 20037 USA
[2] CENETEC, Mexico City, DF, Mexico
[3] Hosp Italiano Buenos Aires, Buenos Aires, DF, Argentina
[4] Banco Interamericano Desarrollo, Washington, DC USA
[5] Hosp Pediat Prof Dr Juan P Garrahan, Buenos Aires, DF, Argentina
[6] Minist Salud Ciudad Autonoma Buenos Aires, Buenos Aires, DF, Argentina
[7] Saluduy, Montevideo, Uruguay
[8] Univ Sao Paulo, Sao Paulo, Brazil
[9] Rede Nacl Ensino & Pesquisa, Rio De Janeiro, Brazil
[10] Univ Oberta Catalunya, Barcelona, Spain
[11] Red Centroamer Informat Salud, Guatemala City, Guatemala
[12] Univ Continental, Lima, Peru