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Date of download: 7/5/2016 From: Sunscreen and Prevention of Skin Aging: A Randomized Trial Ann Intern Med. 2013;158(11):781-790. doi:10.7326/0003-4819-158-11-201306040-00002 Study flow diagram of the Nambour sunscreen use and photoaging study, 1992–1996. Figure Legend: Copyright © American College of Physicians. All rights reserved.American College of Physicians
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Date of download: 7/5/2016 From: Sunscreen and Prevention of Skin Aging: A Randomized Trial Ann Intern Med. 2013;158(11):781-790. doi:10.7326/0003-4819-158-11-201306040-00002 Study flow diagram of the Nambour β-carotene and photoaging study, 1992–1996. Figure Legend: Copyright © American College of Physicians. All rights reserved.American College of Physicians
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Date of download: 7/5/2016 From: Sunscreen and Prevention of Skin Aging: A Randomized Trial Ann Intern Med. 2013;158(11):781-790. doi:10.7326/0003-4819-158-11-201306040-00002 Effect of sunscreen intervention on photoaging, according to baseline characteristics. *P values for heterogeneity of effects were derived using score tests from generalized estimating equations, assuming independent correlations between repeated measures of skin microtopography grades. Figure Legend: Copyright © American College of Physicians. All rights reserved.American College of Physicians
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