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. 2017 Feb 10;14(2):176. doi: 10.3390/ijerph14020176

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© 2017 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Trends in erythemal UVB stratified by satellite type. Local linear regression of erythemal UVB by location from 1978 to 2014 at α = 0.05 stratified by satellite. The beta coefficients shown represent the estimated effect of a 5-year increase on the mean erythemal UVB for (A) Nimbus-7 satellite 1978–1993; (B) Earth Probe satellite 1996–2004; and (C) the Ozone Monitoring Instrument 2004–2014. Beta value symbology based on quartiles of the crude analysis with adjustment in quartile 1 for positive value cutoff.