TY  - RPRT
TI  - Challenges in epidemiologic allergy research.
AU  - G Pershagen
PY  - 1997
DO  - 10.1111/j.1398-9995.1997.tb00174.x
UR  - https://pubmed.ncbi.nlm.nih.gov/9404554/
ID  - 9404554
ER  -