Now Aim 3 will be completed by conducting a nested case-control study of melanoma within the AHS cohort to examine in more detail sun exposure histories and protective behavior. The questionnaire was designed based on findings from the cohort analyses (aim 1) and qualitative methods (aim 2). The risk of melanoma will be examined regarding: a) the complex relationship of cumulative (sun exposure during each decade of life) and intermittent sun exposure (sunburns and sunny vacations), b) factors affecting behavior including attitudes about sun exposure and prevention, and c) the use of tanning salons and sunless tanning creams, particularly in spouses (expected to be rare overall).