text_1: There was an article in JAMA or New England Journal of Medicine within the past 5 years on the futility of doing CPR (cardiopulmonary resuscitation) in the elderly.  What was the reference and what did they recommend?
text_2: What is the reference to the article in JAMA or New England Journal of Medicine in the past 5 years on the futility of doing cardiopulmonary resuscitation in the elderly?