Authors: M Linzer; T R Konrad; J Douglas; J E McMurray; D E Pathman; E S Williams; M D Schwartz; M Gerrity; W Scheckler; J A Bigby; E Rhodes Journal: J Gen Intern Med Date: 2000-07 Impact factor: 5.128
Authors: Oliver Ommen; Elke Driller; Thorsten Köhler; Christoph Kowalski; Nicole Ernstmann; Melanie Neumann; Petra Steffen; Holger Pfaff Journal: BMC Health Serv Res Date: 2009-05-16 Impact factor: 2.655