 Treatments they used included coma therapy, electroshock therapy (ECT), deep sleep therapy and lobotomy.Cleckley later wrote in "The Mask of Sanity" that "Thigpen, my medical associate of many years, has played a major part in the development and the revision of this work".In 1957, with Cleckley, Thigpen co-authored the book "The Three Faces of Eve", the first popular account of a case of multiple personalities (now called dissociative identity disorder).