The attitudes of physicians toward prolonging life.
D000367:Age Factors; D001291:Attitude of Health Personnel; D001293:Attitude to Death; D003657:Decision Making; D030881:Disclosure; D005065:Euthanasia; D028601:Euthanasia, Active; D006801:Humans; D007484:Iowa; D010817:Physician-Patient Relations; D010820:Physicians; D013727:Terminal Care