Although solariums were becoming common in the early 1900s and phototherapy was gaining popularity as a result of the awarding of a Nobel Prize to Finsen in 1903, it wasn't until 1921 when Hess and Unger demonstrated that rickets could be cured by exposure to sunlight that the healthful benefit of sun exposure appreciated.

500 pages, biography

Media	Books Hardcover Book (Book with hard spine and cover)
Released	March 31, 2002
ISBN13	9780792376699
Publishers	Springer
Pages	500
Dimensions	155 × 235 × 28 mm · 848 g
Language	English
Editor	Holick, Michael F.

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