RT Journal T1 CArvedilol, metoprolol, and insulin resistance JF JAMA JO JAMA YR 2005 FD March 9 VO 293 IS 10 SP 1190 OP 1190 DO 10.1001/jama.293.10.1190-a UL http://dx.doi.org/10.1001/jama.293.10.1190-a AB