作者单位:Luis Stokes Cleveland Department of Veterans Affairs Medical Center, Brecksville Division, Brecksville, OH 44141, United States[1]Helfensteinklinik Geislingen, Medical Clinic, Eybstr. 16, 73312 Geislingen, Germany[2]Department of Internal Medicine I, Center for Internal Medicine, University Hospital Ulm, Albert-Einstein-Allee 23, 89081 Ulm, Germany[3]