Photobiology of Photocarcinogenesis. Etiology of Nonmelanocytic Skin Cancer. Etiology and Modeling of Human Melanoma. Vitamin D, Moderate Sun Exposure, and Health. UV Radiation Risks to the Eye. Histopathology Standards: Nonmelanocytic Skin Cancer. Pathology of Skin Cancer. Epidemiology of Nonmelanocytic Skin Cancer. Epidemiology of Cutaneous Malignant Melanoma. Descriptive Epidemiology of Skin Cancer: Incidence and Mortality. Molecular Epidemiology of Skin Cancer. The Usefulness of Sunscreens. Solaria. Risk Groups for Skin Cancer and Aspects on Preventive Management. Behavioral Aspects of Prevention and Early Detection. Periods of Life Program Continuous Primary Prevention of Skin Cancer in Certain Age Groups. Aims of Primary Prevention of Skin Cancer. Screening for Melanoma. Communicating the Incalculable. Sun Protection at School. The UV Index in Practice. Prevention of Malignant Melanoma: Health Economic Aspects. Screening for Melanoma.