Most people who expose themselves to the sun may need protection from it. For those with a normal skin this is largely a cosmetic matter, but for patients who react abnormally to sunlight it is an important medical problem.
Statistics from Altmetric.com
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.