title: Matching for risk factors in case control studies.
authors.affiliation: Department of Community Medicine, Indira Gandhi Medical College, Shimla 171 001, Himachal Pradesh, India.
authors.forename: Kanica
authors.initials: K
authors.lastname: Kaushal
mesh_terms: D015179:Colorectal Neoplasms / Q000453:epidemiology* / Q000235:genetics*; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics*; D005260:Female; D006801:Humans; D008297:Male
chemical_list: D003577:Cytochrome P-450 Enzyme System