title: Low 25-hydroxyvitamin D concentrations may explain the link between breast cancer risk and shift work.
authors.affiliation: Sunlight, Nutrition, and Health Research Center, P.O. Box 641603, San Francisco, CA, 94164-1603, USA, wbgrant@infionline.net.
authors.forename: William B
authors.initials: WB
authors.lastname: Grant
mesh_terms: D001943:Breast Neoplasms / Q000209:etiology*; D005260:Female; D006801:Humans; D016273:Occupational Exposure / Q000009:adverse effects*; D020178:Sleep Disorders, Circadian Rhythm / Q000150:complications*