Up-down hand position switch may delay the fatigue of non-dominant hand position rescuers and improve chest compression quality during cardiopulmonary resuscitation: a randomized c... oleh Xian-Long Zhou, Lei Li, Cheng Jiang, Bing Xu, Huang-Lei Wang, Dan Xiong, Li-Pin Sheng, Qi-Sheng Yang, Shan Jiang, Peng Xu, Zhi-Qiao Chen, Yan Zhao