After consensus has been reached, it is incorporated in textbooks. There are textbooks on every medical specialty and they contain comprehensive discussion on all diseases and their diagnosis, therapy and prognosis. The first textbook to utilize experts to write specific chapters within the book was the Cecil Textbook of Medicine edited by Russell Cecil, MD in 1927. The book was an immediate international success because of the idea that single or double author medical books was outmoded, "since the scope of medical knowledge was far surpassing the capacity of any single individual to encompass". Since that time, this has been the standard. Examples are: