“…AU three enzymes were found to be elevated in the serum of patients with progressive muscular dystrophy but not in those with muscular atrophy due to disorders of the central or peripheral nervous system. Several workers have since confirmed these original findings (Jacob and Neuhaus, 1954;Beckmann, 1956;Volk, 1956, 1957;Pearson, 1957;Evans and Baker, 1957;White and Hess, 1957;Rowland and Ross, 1958;White, 1959;Thompson and Vignos, 1959).…”