title: An AOA critical issue: aging of the North American population: new challenges for orthopaedics.
authors.forename: Bertram M
authors.initials: BM
authors.lastname: Kummel
mesh_terms: D000368:Aged; D000375:Aging / Q000502:physiology*; D006801:Humans; D008875:Middle Aged; D009140:Musculoskeletal Diseases / Q000503:physiopathology*; D009142:Musculoskeletal Physiological Phenomena; D009656:North America; D009985:Orthopedics / Q000639:trends