Association of known melanoma risk factors with primary melanoma of the scalp and neck by Wood, RP, Heyworth, JS, McCarthy, NS, Mauguen, A, Berwick, M, Thomas, NE, Millward, MJ, Anton-Culver, H, Cust, AE, Dwyer, T, Gallagher, RP, Gruber, SB, Kanetsky, PA, Orlow, I, Rosso, S, Moses, EK, Begg, CB, Ward, SV