1. Intensive Care;Skillman,1975
2. The use and costs of Medicare services in the last two years of life;Lubitz;HCFR,1984
3. Life Sustaining Technology and the Elderly;Office of Technology Assessment,1987
4. Coronary artery surgery in patients over 65 years of age;Gersh,1985
5. Cardiovascular system;Wei,1988