Figure 2
From: Impact of gender on vitamin D deficiency in morbidly obese patients: a cross-sectional study
Mean (s.d.) vitamin D concentrations in morbidly obese men and women (y-axis) according to month of sampling (x-axis; 1 denotes January; 2, February; 3, March; 4, April and so on) Grey filled circles, men; black filled squares, women.
