[1] Hosp Infantil Mexico Dr Federico Gomez, Ctr Estudios Econ & Sociales Salud, Direcc Invest, Secretaria Salud, Mexico City, DF, Mexico
[2] Inst Mexicano Seguro Social, Unidad Invest Econ Salud, Mexico City, DF, Mexico
[3] CEA Hlth Tech, Mexico City, DF, Mexico