Authors: O Y Chernyshev; S Martin-Schild; K C Albright; A Barreto; V Misra; I Acosta; J C Grotta; S I Savitz Journal: Neurology Date: 2010-03-24 Impact factor: 9.910
Authors: John Q Young; Sumant R Ranji; Robert M Wachter; Connie M Lee; Brian Niehaus; Andrew D Auerbach Journal: Ann Intern Med Date: 2011-07-11 Impact factor: 25.391