4World Health Organization, United Nations International Children's Emergency Fund. Second workshop on the monitoring systems for maternal and child mortality in public health care facilities. Manila:WHO/WPRO, 2002. 80-87.
5Guyer B, Freedman MA, Strobino DM, et al. Annual summary of vital statistics: trends in the health of Americans during the 20th century. Pediatrics, 2000,106:1307-1317.
6Hoyert DL, Freedman MA, Strobino DM, et al. Annual summary of vital statistics: 2000. Pediatrics, 2001,108:1241-1255.
7World Health Organization. Integrated management of childhood illness. Geneva: WHO, 1997.7-16.
8Reynolds MA, Schieve LA, Martin JA, et al. Trends in multiple births conceived using assisted reproductive technology, United States, 1997-2000. Pediatrics, 2003,111:1159-1162.
