TY  - RPRT
TI  - Methodological problems in a case-referent study based on a register of occupational asthma.
AU  - B Jarvholm
PY  - 2002
DO  - 10.1136/oem.59.1.63
UR  - https://pubmed.ncbi.nlm.nih.gov/11836471/
ID  - 11836471
ER  -