1028-9933 1028-9933 S1028-99332018000601149 Angola Cuba Cuba Cuba 00 12 2018 00 12 2018 97 6 1149 1159

1 1999 6 ed 287-91 2 1997 3 1997 4 1995 24 123-30 5 OPS/OMS 1978 9ed 6 1979 2ed 7 2000 8 1997 9 1987 3 2 2 168-74 10 1996 11 1983 12 1991 7 42-56 13 1974 196 10-20 14 1994 140-5