Authors: M L Lindegren; R H Byers; P Thomas; S F Davis; B Caldwell; M Rogers; M Gwinn; J W Ward; P L Fleming Journal: JAMA Date: 1999-08-11 Impact factor: 56.272
Authors: E M Connor; R S Sperling; R Gelber; P Kiselev; G Scott; M J O'Sullivan; R VanDyke; M Bey; W Shearer; R L Jacobson Journal: N Engl J Med Date: 1994-11-03 Impact factor: 91.245