Ting-Chao Chou (born 1938 in Taiwan, Chinese name: 周廷潮) is a Chinese American theoretical biologist, pharmacologist, cancer researcher and inventor. His 353 scientific papers have been cited in 40,108 times in over 1,469 biomedical journals as of October 15, 2022. He derived the median-effect equation (MEE) from the physico-chemical principle of the mass-action law, and introduced the median-effect plot in 1976. With Paul Talalay of the Johns Hopkins University School of Medicine, he derived the combination index equation (CIE) for multiple drug effect interactions, and introduced the concept of combination index (CI) for quantitative definition of synergism (CI<1), additive effect (CI=1), and antagonism (CI>1) using computerized simulations. This article has received 7,731 citations inter