Efficacy on rabbits with arrhythmia: needling acupoint of Neiguan (PC6) at shallow or deep depth, and retaining needles for 10, 20, or 30 min. - Gu CL; Cheng K; Yang SQ; Ran SF; Tai H; Gao XF; Pang DD (Journal of traditional Chinese medicine = Chung i tsa chih ying wen pan, 2021)