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. 2020 Feb 27;18:31. doi: 10.1186/s12916-020-1502-7

Fig. 1.

Fig. 1

Geometric means for different iron biomarkers by age in years and sex. Orange indicates females and blue males. Error bars indicate 95% confidence intervals. Star indicates Student’s t test p value < 0.05 for mean differences between sex. BIS, body iron stores; sTfR, soluble transferrin receptor; TSAT, transferrin saturation