The use of muscle biopsy.
D001706:Biopsy; D001769:Blood; D002712:Chlorides; D003201:Computers; D006801:Humans; D066298:In Vitro Techniques; D009132:Muscles / Q000473:pathology*; D011188:Potassium; D012964:Sodium; D014882:Water-Electrolyte Balance
D002712:Chlorides; D012964:Sodium; D011188:Potassium