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Li He, Lan Wang, Lun Li, Xiaoyan Liu, Yijun Yu, Xiaoyun Zeng, Huanhuan Li, Ye Gu
A single-center randomized controlled trial observing the safety and efficacy of modified step-up graded Valsalva manoeuver in patients with vasovagal syncope
www.plosone.org
www.plosone.org
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