after the addition of metoprolol , the onset of angina was delayed substantially more ( 9.57 +/- 2.22 min , p less than 0.001 vs. p and n ) and occurred at much higher workloads ( 62 +/- 20 w , p less than 0.001 vs. p and n ) .
C0025859
metoprolol
C0002962
angina