Authors: T F O'Brien; J D Hopkins; E S Gilleece; A A Medeiros; R L Kent; B O Blackburn; M B Holmes; J P Reardon; J M Vergeront; W L Schell; E Christenson; M L Bissett; E V Morse Journal: N Engl J Med Date: 1982-07-01 Impact factor: 91.245
Authors: N C Munro; D C Currie; K S Lindsay; T A Ryder; A Rutman; A Dewar; M A Greenstone; W F Hendry; P J Cole Journal: Thorax Date: 1994-07 Impact factor: 9.139