title: Heritability and seasonal variability of vitamin D concentrations in male twins.
authors.affiliation: Departments of Medicine and the Division of Endocrinology, Metabolism and Lipids, Emory University, Atlanta, GA, USA.
authors.forename: Cristina
authors.initials: C
authors.lastname: Karohl
authors.forename: Shaoyong
authors.initials: S
authors.lastname: Su
authors.forename: Meena
authors.initials: M
authors.lastname: Kumari
authors.forename: Vin
authors.initials: V
authors.lastname: Tangpricha
authors.forename: Emir
authors.initials: E
authors.lastname: Veledar
authors.forename: Viola
authors.initials: V
authors.lastname: Vaccarino
authors.forename: Paolo
authors.initials: P
authors.lastname: Raggi