For years, the American Cancer Society (ACS) urged women to start mammograms at age 40, but they recently changed their guidelines. They now recommend beginning them at age 45, or at 40 if the patient chooses.
Coolidge ran for president in 1924 and won decisively over the Democratic candidate, U.S. Representative John W. Davis (1873-1955) of West Virginia, and the Progressive Party candidate, U.S. Senator Robert M. La Follette (1855-1925) of Wisconsin.
This is what made Coolidge such a great President. He was surrounded by progressives, he heard what they were saying, their attacks on American life, on so called  eighteenth century ideas  of  individualism . But Coolidge says no. He says some things are indeed final, and the Declaration is restful.