Authors: B P Citron; M Halpern; M McCarron; G D Lundberg; R McCormick; I J Pincus; D Tatter; B J Haverback Journal: N Engl J Med Date: 1970-11-05 Impact factor: 91.245
Authors: C E Cherubin; W S Rosenthal; R E Stenger; A M Prince; M Baden; R Strauss; T G McGinn Journal: Ann Intern Med Date: 1972-03 Impact factor: 25.391