AU  - Krumholz HM, Radford MJ, Wang Y, Chen J, Heiat A, Marciniak TA
TI  - National use and effectiveness of β-blockers for the treatment of elderly patients after acute myocardial infarction: National cooperative cardiovascular project
PT  - JOUR
DP  - 1998
TA  - JAMA
pages = {623-629},
VI  - 280
IP  - 7
AID  - 10.1001/jama.280.7.623 [doi]
4100  - http://dx.doi.org/10.1001/jama.280.7.623
SO  - JAMA August 19, 1998 280(7):623