Authors: Ethan M Balk; Joseph Lau; Leonidas C Goudas; Harmon S Jordan; Bruce Kupelnick; Linda U Kim; Richard H Karas Journal: Ann Intern Med Date: 2003-10-21 Impact factor: 25.391
Authors: K M Venkat Narayan; James P Boyle; Theodore J Thompson; Stephen W Sorensen; David F Williamson Journal: JAMA Date: 2003-10-08 Impact factor: 56.272