title: Lewis negative genotype and breast cancer risk.
authors.forename: R F
authors.initials: RF
authors.lastname: Phipps
authors.forename: P M
authors.initials: PM
authors.lastname: Perry
mesh_terms: D000293:Adolescent; D000328:Adult; D001943:Breast Neoplasms / Q000097:blood*; D005260:Female; D005838:Genotype; D006801:Humans; D007983:Lewis Blood Group Antigens / Q000235:genetics*; D008875:Middle Aged; D012307:Risk Factors; D012463:Saliva / Q000032:analysis
chemical_list: D007983:Lewis Blood Group Antigens