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Heart Rate Variability Is Associated with Exercise Capacity in Patients with Cardiac Syndrome X
- Dai-Yin Lu,
- Albert C. Yang,
- Hao-Min Cheng,
- Tse-Min Lu,
- Wen-Chung Yu,
- Chen-Huan Chen,
- Shih-Hsien Sung
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- Published: January 26, 2016
- https://doi.org/10.1371/journal.pone.0144935