title: RESPONSE: re: urinary 2-Hydroxyestrone/16alpha-hydroxyestrone ratio and risk of breast cancer in postmenopausal women
authors.affiliation: G. Ursin, Department of Preventive Medicine, University of Southern California/Norris Comprehensive Cancer Center, Los Angeles.
authors.initials: G
authors.lastname: Ursin
authors.initials: S
authors.lastname: London