1. Current challenges in photoprotection
Henry W. Lim, MD, Maria-Ivonne Arellano-Mendoza, MD, Fernando Stengel, MD 
Journal of the American Academy of Dermatology 
Volume 76, Issue 3, Pages S91-S99 (March 2017)
DOI: /j.jaad
Copyright © 2016 American Academy of Dermatology, Inc. Terms and Conditions

2. Fig 1
Odds ratio of vitamin-D deficiency comparing frequent with rare users according to sun-protective behaviors among US white individuals. SPF, Sun-protection factor.
© Springer Science+Business Media B.V With permission of Springer.41
Journal of the American Academy of Dermatology  , S91-S99DOI: ( /j.jaad )
Copyright © 2016 American Academy of Dermatology, Inc. Terms and Conditions

3. Fig 2
Change from baseline to month 12 in number of actinic keratoses, adjusted for center: 11% lower in the nicotinamide group than in the placebo group at 3 months (P = .01), 14% lower at 6 months (P < .001), 20% lower at 9 months (P < .001), and 13% lower at 12 months (P = .001).
Copyright © 2015 Massachusetts Medical Society. Reprinted with permission from Massachusetts Medical Society.62
Journal of the American Academy of Dermatology  , S91-S99DOI: ( /j.jaad )
Copyright © 2016 American Academy of Dermatology, Inc. Terms and Conditions