bibliographicCitation |
Hayano J, Jiang W, Waugh R, O'Connor C, Frid D, Blumenthal JA. Stability over time of circadian rhythm of variability of heart rate in patients with stable coronary artery disease. Am Heart J. 1997 Sep;134(3):411–8. doi: 10.1016/s0002-8703(97)70075-9. PMID: 9327696. |