(g hard). Galen says “Nay,” and Hippocrates “Yea.” The doctors disagree, and who is to decide? Galen was a physician of Asia Minor in the second Christian century. Hippocrates—a native of Cos, born B.C. 460—was the most celebrated physician of antiquity.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894