0185-3325 0185-3325 S0185-33252006000200038 México 00 04 2006 00 04 2006 29 2 38 43

1 1986 174 727-35 2 1993 6 16-27 3 1993 150 1030-6 4 2000 5 2000 157 6 6 1012-3 6 1995 7 1990 3 151-3 8 2000 189 4 4 249-57 9 10 2003 34 1 1 114-6 11 1995 152 9 9 1343-8 12 2000 13 1996 19 ^s2 ^s2 2 19-25 14 2000 15 1992 5 88-91 16 1989 177 487-91 17 1989 2 169-89 18 2000 I Séptima 19 1996 153 10 10 1329-33 20 1998 107 2 2 272-84 21 1994 22 1998 155 6 6 800-5 23 1996 16 365-82 24 WORLD HEALTH ORGANIZATION 2004 291 2581-90