Columbia subject headings:
Photosensitization, Biological.
Skin--Abnormalities.
Skin--Aging.
Skin--Effect of radiation on.
Ultraviolet radiation--Physiological effect.
Harvard subject headings:
Photosensitization, Biological.
Skin--Abnormalities
Skin--Aging
Skin--Effect of radiation on
Ultraviolet radiation--Physiological effect.
Princeton subject headings: