Narrowband ultraviolet B course improves vitamin D balance in women in winter.
Vahavihu, K. *,+,++; Ylianttila, L. [S]; Kautiainen, H. [P]; Viljakainen, H. **; Lamberg-Allardt, C. **; Hasan, T. ++; Tuohimaa, P. ++; Reunala, T. ++,++++; Snellman, E. *,[S][S]
[Article] British Journal of Dermatology. 162(4):848-853, April 2010.

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