Additional file 2.
Percentage increase/decrease in level of 25(OH)D and humoral immune components in older Swiss. The percentage increase or decrease in seasonal variation of the humoral immune components showing significant correlation in seasonal variation with 25(OH)D, compared to the month of January (100%) is further illustrated here.
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Sakem et al. BMC Medicine 2013 11:176 doi:10.1186/1741-7015-11-176