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. 2019 Mar 1;20:71. doi: 10.1186/s12882-019-1261-x

Fig. 1.

Fig. 1

a-c Box plots of PMP concentrations for the three groups of patients with various degree of kidney function. Group H (n = 19); CKD 3 (n = 15); CKD 4–5 (n = 13)