@article{Frenk1991,
author = {Frenk, J. and Bobadilla, J.L. and Stern, C. and Frejka, T. and Lozano, R.},
title= {Elements for a theory of the health transition},
year = {1991},
journal = {Health Transition Review},
volume = {1},
number = {1},
pages = {21--38},
}