Baseline characteristics of subjects (n = 18).
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* level 1: inactive or little activity; level 2: regular (≥ 5 days/ week), low level of exertion (≥ 10 min at a time); level 3: aerobic exercise for 20–60 min/week; level 4: aerobic exercise for 1–3 hours/week; level 5: aerobic exercise over 3 hours/week.Baseline characteristics of subjects (n = 18).
创建时间：
2015-12-03
