Department of Internal Medicine Konkuk University Medical Center Seoul KS013 South Korea;
Department of Internal Medicine Konkuk University Medical Center Seoul KS013 South Korea;
Department of Internal Medicine Konkuk University Medical Center Seoul KS013 South Korea;
Department of Neurology Konkuk University Medical Center Seoul KS013 South Korea;
Division of Rheumatology Department of Internal Medicine Konkuk University School of Medicine Seoul KS013 South Korea;
Division of Rheumatology Department of Internal Medicine Konkuk University School of Medicine Seoul KS013 South Korea;
Diabetes mellitus; Neuropathies; Hydroxymethylglutaryl-CoA reductase inhibitors; Metformin;