PT  - JOURNAL ARTICLE
AU  - de Irala, Jokin
TI  - Epidemiologic methods. Studying the occurrence of illness
DP  - 2004 Dec 01
TA  - Journal of Epidemiology and Community Health
PG  - 1055--1055
VI  - 58
IP  - 12
4099  - http://jech.bmj.com/content/58/12/1055.3.short
4100  - http://jech.bmj.com/content/58/12/1055.3.full
SO  - J Epidemiol Community Health2004 Dec 01; 58