title: The medicare program: enrollment and participation options.
authors.affiliation: Division of Advocacy and Health Policy, USA.
authors.forename: Jenny J
authors.initials: JJ
authors.lastname: Jackson
mesh_terms: D013502:General Surgery / Q000191:economics; D007349:Insurance, Health, Reimbursement; D006278:Medicare / Q000331:legislation & jurisprudence* / Q000458:organization & administration; D014481:United States