Texte intégral
758 Bulletin of the World Health Organization 2003, 81 (10) Reproduced by permission of The Lancet, © 1952 759Bulletin of the World Health Organization 2003, 81 (10) 760 Bulletin of the World Health Organization 2003, 81 (10) 761Bulletin of the World Health Organization 2003, 81 (10)