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68 percent got vitamin D above 40 ng by regular use of tanning bed - July 2013

Attached files

ID Name Comment Uploaded Size Downloads
2763 UVB_Exposure raises vitamin D levels.pdf admin 10 Jul, 2013 185.81 Kb 804
2762 Grassroots tanning.jpg admin 10 Jul, 2013 40.11 Kb 3799