TY  - RPRT
TI  - Estimating attributable fraction in partially ecologic case-control studies.
AU  - Jonas Björk
AU  - Ulf Strömberg
PY  - 2002
DO  - 10.1097/00001648-200207000-00015
UR  - https://pubmed.ncbi.nlm.nih.gov/12094102/
ID  - 12094102
ER  -