The American Medical Association (AMA), founded in 1847 and incorporated in 1897, is the largest association of physicians—both MDs and DOs—and medical students in the United States. The AMAs stated mission is to promote the art and science of medicine for the betterment of the public health, to advance the interests of physicians and their patients, to promote public health, to lobby for legislation favorable to physicians and patients, and to raise money for medical education. The Association also publishes the Journal of the American Medical Association (JAMA), which has the largest circulation of any weekly medical journal in the world. The AMA also publishes a list of Physician Specialty Codes which are the standard method in the U.S. for identifying physician and practice specialties. In 1847 after a report by physician Nathan Smith Davis, members of the AMA met in Philadelphia as a national professional medical organization, the first of its kind in the world, going on to establish uniform standards for medical education, training, and practice, the worlds first national code for ethical medical practice. Ever since, the AMA Code of Medical Ethics dictates professional conduct for practicing physicians.