Authors: K E Covinsky; A W Wu; C S Landefeld; A F Connors; R S Phillips; J Tsevat; N V Dawson; J Lynn; R H Fortinsky Journal: Am J Med Date: 1999-04 Impact factor: 4.965
Authors: I Voigt; J Wrede; H Diederichs-Egidi; M-L Dierks; E Hummers-Pradier; U Junius-Walker Journal: Z Gerontol Geriatr Date: 2010-09-08 Impact factor: 1.281