Fig. 1From: Association between serum 25-hidroxyvitamin D concentrations and ultraviolet index in Portuguese older adults: a cross-sectional studyVariation of mUVI and 25(OH)D concentrations by month of blood collection. mUVI (mean values and SD in error bars) 25(OH)D concentrations (nmol/L) (median values, Q1 and Q3 in error bars)Back to article page