NPPB and Miyoshi myopathy: Pavo N et al. [24] conducted a retrospective analysis on 118 MM patients and found that NT-proBNP was positively correlated with β2-microglobulin and MM disease progression [ISS stage 1 133.3 pg/mL, ISS stage 2 487.4 pg/mL, ISS stage 3 969.1 pg/mL].