RT Journal A1 Grant WB T1 LOw serum 25-hydroxyvitamin d levels and the bidirectional association between depression and type 2 diabetes mellitus in women JF Archives of Internal Medicine JO Archives of Internal Medicine YR 2011 FD June 13 VO 171 IS 11 SP 1041 OP 1042 DO 10.1001/archinternmed.2011.222 UL http://dx.doi.org/10.1001/archinternmed.2011.222 AB There is very good observational evidence that a low serum 25(OH)D level is a risk factor for developing type 2 diabetes. In the Nurses Health Study,