[1] Complutense University of Madrid,Department of Public Maternal and Child Health, Faculty of Medicine
[2] CIBER in Epidemiology and Public Health (CIBERESP),Department of Smoking Prevention and Control, Center for Population Research
[3] National Institute of Public Health of Mexico,undefined
[4] Col. Santa María Ahuacatitlán,undefined
[5] Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC),undefined
[6] Andalusian School of Public Health,undefined
[7] Instituto de Investigación Biosanitaria de Granada (Ibs. GRANADA),undefined
[8] University of California,undefined
[9] San Diego (UCSD),undefined
[10] San Diego State University (SDSU),undefined