Davies, J R, Chang, Y M, Snowden, H, Chan, M, Leake, S, Karpavicius, B, Haynes, S, Kukalizch, K, Randerson-Moor, J, Elliott, F, Barth, J, Kanetzky, P A, Harland, M, Bishop, D T, Barrett, J H, Newton-Bishop, J A, "The determinants of serum vitamin D levels in participants in a melanoma case-control study living in a temperate climate", Cancer Causes & Control, 2011