As of 1990 about twenty volumes containing perhaps a fifth of the Corpus were published. Although the principles of the edition varied somewhat over the 75 year course of the project, all volumes represent a decisive advance over Kühn (No. 28). Important treatises accompanied by English translations include: Galen on the Doctrines of Hippocrates and Plato, edited and translated by Phillip De Lacy, C.M.G. V, 4, 1, 2, 3 vols., 1978-84. Galen on Prognosis, edited and translated by Vivian Nutton, C.M.G. V, 8, 1, 1979. Galen on examinations by which the best physicians are recognized, edited in Arabic and translated by Albert Iskandar, C.M.G. Supplementum Orientale IV, 1988.