Authors: C Trey; L Lipworth; T C Chalmers; C S Davidson; L S Gottlieb; H Popper; S J Saunders Journal: N Engl J Med Date: 1968-10-10 Impact factor: 91.245
Authors: J M Burnell; J K Dawborn; R B Epstein; R A Gutman; G E Leinbach; E D Thomas; W Volwiler Journal: N Engl J Med Date: 1967-04-27 Impact factor: 91.245