DISCLAIMER AND ACKNOWLEDGMENT
The results and conclusions in this chapter are those of the authors and do not necessarily reflect the opinions of the institutions for which they work. The authors are grateful to Ana Mylena Aguilar, Hector Arreola, Ania Burczysnka, Esperanza Calleja, Marissa Courey, Monica Hurtado, Vanesa Leyva, Eugenia Rocha, Swathi Sista, and Sinaia Urrusti for excellent research assistance and to the Mexican Health Foundation's Council on Health and Competitiveness and the National Council for Science and Technology of Mexico for support for this research.
