TY  - RPRT
TI  - Risk set sampling for case-crossover designs.
AU  - William Navidi
AU  - Eric Weinhandl
PY  - 2002
DO  - 10.1097/00001648-200201000-00016
UR  - https://pubmed.ncbi.nlm.nih.gov/11805593/
ID  - 11805593
ER  -