title: Vitamin D deficiency: A potential risk factor for Clostridium difficile infection.
authors.affiliation: Department of Internal Medicine, Division of Infectious Diseases, San Francisco, CA USA.
authors.forename: Dima
authors.initials: D
authors.lastname: Youssef
authors.forename: William B
authors.initials: WB
authors.lastname: Grant
authors.forename: Alan N
authors.initials: AN
authors.lastname: Peiris