TY - RPRT TI - Stratified analysis of case-control studies with the factor under study taking multiple values. AU - A P Hill AU - M C Pike AU - P G Smith AU - H W Ory PY - 1978 DO - 10.1016/0021-9681(78)90042-5 UR - https://pubmed.ncbi.nlm.nih.gov/711847/ ID - 711847 ER -