[1] Hasselt Univ, Fac Med & Life Sci, Limburg Clin Res Ctr, Hasselt, Belgium
[2] Univ Florence, Dept Biomed Expt & Clin Sci Mario Serio, Florence, Italy
[3] West Bengal Univ Hlth Sci, Burdwan Med Coll & Hosp, Dept Hlth & Family Welf, Govt West Bengal, Kolkata, W Bengal, India
[4] Inst Canc Res Prevent & Clin Network ISPO, Canc Risk Factors & Lifestyle Epidemiol Unit, Florence, Italy
[5] Univ Rochester, Dept Dermatol, Med Ctr, Rochester, NY USA
[6] Univ Rochester, Dept Radiat Oncol, Med Ctr, Rochester, NY USA
[7] Netherlands Comprehens Canc Org, Utrecht, Netherlands
[8] Univ Hosp, Dept Dermatol, Cleveland, OH USA
[9] Univ Toronto, Sunnybrook Hlth Sci Ctr, Toronto, ON, Canada
[10] Azienda Osped Univ Careggi, Dept Radiat Oncol, Florence, Italy
[11] Univ Toronto, Dept Radiat Oncol, Toronto, ON, Canada
[12] McMaster Univ, Michael G DeGroote Sch Med, Hamilton, ON, Canada