Authors: J Lynn; J M Teno; R S Phillips; A W Wu; N Desbiens; J Harrold; M T Claessens; N Wenger; B Kreling; A F Connors Journal: Ann Intern Med Date: 1997-01-15 Impact factor: 25.391
Authors: C S Cleeland; R Gonin; A K Hatfield; J H Edmonson; R H Blum; J A Stewart; K J Pandya Journal: N Engl J Med Date: 1994-03-03 Impact factor: 91.245