Table 2. Characteristics of patients with CHF and the control group.
| Control (n = 20) | CHF (n = 68) | |
| Age, y | 53±7 | 55±11 |
| Sex, male/female | 9/11 | 32/36 |
| NYHA functional class, n | ||
| I | 20 | |
| II | 11 | |
| III | 26 | |
| IV | 31 |
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