TY  - RPRT
TI  - Evolution of the cohort study.
AU  - J M Samet
AU  - A Muñoz
PY  - 1998
DO  - 10.1093/oxfordjournals.epirev.a017964
UR  - https://pubmed.ncbi.nlm.nih.gov/9762505/
ID  - 9762505
ER  -