Median calretinin values in serum vs. plasma revealed no significant differences within the group of healthy controls (0.19 vs. 0.21 ng/ml, respectively; p = 0.69), asbestos-exposed workers (0.31 vs. 0.42 ng/ml, respectively; p = 0.55), or MM patients (0.77 vs. 1.02 ng/ml, respectively; p = 0.96). Here, CALB2 is linked to Miyoshi myopathy.