Cervical computer traction (20 minutes, once a day)
2 weeks
Pain score (VAS)
CMA-1993 = diagnosis criterion issued by Chinese Medical Association in 1993; SATCM-1994 = diagnosis criterion of State Administration of Traditional Chinese Medicine in 1994; NPTMC-2007 = diagnosis criterion from National Projected Teaching Materials of China in 2007; C = control group; NRS = numerical rating scale; VAS = visual analogue scale.