[1] Oregon Hlth & Sci Univ, Div Surg Oncol, Portland, OR 97201 USA
[2] Texas A&M Univ, Dept Epidemiol & Biostat, College Stn, TX USA
[3] Calif Pacific Med Ctr & Res Inst, San Francisco, CA USA
[4] Mayo Clin, Phoenix, AZ USA
[5] H Lee Moffitt Canc Ctr & Res Inst, Dept Cutaneous Oncol, Tampa, FL USA
[6] Univ S Florida, Dept Oncol Sci, Morsani Coll Med, Tampa, FL 33620 USA
[7] Ist Tumori Napoli Fdn G Pascale, Naples, Italy
[8] Tel Aviv Sourasky Med Ctr, Tel Aviv, Israel