American Heart Association
The American Heart Association grew out of a set of smaller precursor groups. The primary precursor was the Association for the Prevention and Relief of Heart Disease, formed in New York City in 1915, to study whether patients with heart disease could safely return to work. Several similar organizations formed or evolved in Boston, Philadelphia, and Chicago in the 1920s. Recognizing the need for a national organization to share research and promote findings, the American Heart Association was formed in 1924 by six cardiologists representing several of these precursor groups.
American Association of Advertising Agencies
The American Association of Advertising Agencies was founded on June 4, 1917, in St. Louis by five regional advertising industry groups and 111 charter members. As its founding came right after the U.S. entry into World War I, one of the association's earliest actions was to urge its members to "sound a patriotic note in ads in support of the war effort". In December 1917, the Division of Advertising of the Committee of Public Information office opened under the organization's auspices, with a government charter to coordinate all wartime campaigns, including advertising for the U.S. Army, U.S. Navy, liberty bonds, victory loans, and the Red Cross.