Circulating insulin‐like growth factor I in relation to melanoma risk in the European prospective investigation into cancer and nutrition by Bradbury, K, Appleby, P, Tipper, S, Travis, R, Allen, N, Kvaskoff, M, Overvad, K, Tjønneland, A, Halkjaer, J, Cevenka, I, Mahamat-Saleh, Y, Bonnet, F, Kaaks, R, Turzanski Fortner, R, Boeing, H, Trichopoulou, A, La Vecchia, C, Stratigos, A, Palli, D, Grioni, S, Matullo, G, Panico, S, Tumino, R, Peeters, P, Bueno-De-Mesquita, B, Ghiasvand, R, Veierød, M, Weiderpass, E, Bonet, C, Molina, E, Huerta, J, Larrañaga, N, Barricarte, A, Merino, S, Isaksson, K, Stocks, T, Ljuslinder, I, Hemmingsson, O, Wareham, N, Khaw, K, Gunter, M, Rinaldi, S, Tsilidis, K, Aune, D, Riboli, E, Key, T