(A) Myotonia in the quadriceps muscle of HSALR mice treated with erythromycin (EM, green), pafuramidine (PaF, blue) or the combination (EM+PaF, magenta) determined via electromyography. (B) Immunofluorescence in quadriceps muscle of untreated (HSALR), erythromycin (EM), pafuramidine (PaF) and combination-treated (HSALR + EM + PaF) HSALR mice against chloride channel, Clcn1 (green). DAPI shown in blue.