RT Journal A1 Stern LZ, Gruener R, Anderson RM T1 EXternal intercostal muscle biopsy JF Archives of Neurology JO Archives of Neurology YR 1975 FD November 1 VO 32 IS 11 SP 779 OP 780 DO 10.1001/archneur.1975.00490530101013 UL http://dx.doi.org/10.1001/archneur.1975.00490530101013 AB • External intercostal muscle biopsies were performed on 36 patients with neuromuscular disease, 13 patients undergoing thoracotomy for other diseases, and 3 healthy volunteers. The procedure is safe, of diagnostic value, and uniquely useful as a research tool, as it allows correlation of results of histochemical, ultrastructural, physiological, pharmacological, and biochemical studies on the same specimens.