Texte intégral
Reproduced by permission of The University of Chicago Press, # 1972 63Bulletin of the World Health Organization 2002, 80 (1) 64 Bulletin of the World Health Organization 2002, 80 (1) 65Bulletin of the World Health Organization 2002, 80 (1) 66 Bulletin of the World Health Organization 2002, 80 (1) 67Bulletin of the World Health Organization 2002, 80 (1) 68 Bulletin of the World Health Organization 2002, 80 (1) 69Bulletin of the World Health Organization 2002, 80 (1) 70 Bulletin of the World Health Organization 2002, 80 (1) 71Bulletin of the World Health Organization 2002, 80 (1) 72 Bulletin of the World Health Organization 2002, 80 (1) 73Bulletin of the World Health Organization 2002, 80 (1)