Jürgen KovacsPaul U. Unschuld is Director of the Institute of the History of Medicine, Munich University, and author of Nan-ching: The Classic of Difficult Issues (California, 1986), Medicine in China: A History of Pharmaceutics (California, 985) and (California, 1985). Jürgen Kovacs, an ophthalmologist, is Research Fellow at the Institute of the History of Medicine, Munich University. Read More Read Less