Dr. A. (Armin) Steinmetz is affiliated with the Department of Endocrinology and Metabolism Center for Internal Medicine, Philipps University, Marburg, Germany. He has co-authored books with Hans Kaffarnik and Jürgen Schneider, including *Cholesterol Transport Systems and Their Relation to Atherosclerosis* and *Hormones in Lipoprotein Metabolism*. Source: [Springer](https://link.springer.com/book/10.1007/978-3-642-83665-7)