Frenk J, Bobadilla JL, Sepúlveda J. Health transition in middle income countries: New challenges for the organization of services. J Health Policy Plann 1989; 4(1):29-39.

Frenk J, Bobadilla JL, Sepúlveda J. Health transition in middle income countries: New challenges for the organization of services. J Health Policy Plann 1989; 4(1):29-39

Frenk J, Bobadilla JL, Sepúlveda J. Health transition in middle income countries: New challenges for the organization of services. J Health Policy Plann 1989; 4(1):29-39.