LACTB and Miyoshi myopathy: The incidence of MM demonstrated positive associations with the consumption of tetracycline (J01A) (r = 0.492, p = 0.006), with penicillin (J01C) (r = 0.366, p = 0.047), and narrow spectrum, beta-lactamase resistant penicillin (J01CF), (r = 0.574, p = 0.001).