Dr. Dwight German, UT Southwestern Medical Center (image) UT Southwestern Medical Center Share Print E-Mail Caption Dr. Dwight German is one of the researchers whose published investigation has shown that people with Parkinson's disease have much higher blood levels of a particular pesticide than healthy people or those with Alzheimer's disease. Credit UT Southwestern Medical Center Usage Restrictions Please use our credit line. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.