Effect of sunlight exposure on cognitive function among depressed and non-depressed participants: a REGARDS cross-sectional study
Shia T Kent, Leslie A McClure, William L Crosson, Donna K Arnett, Virginia G Wadley, and Nalini Sathiakumar
Environ Health. 2009; 8: 34. Published online 2009 July 28. doi: 10.1186/1476-069X-8-34.PMCID: PMC2728098