1. Hong CZ, Simons DG: Pathophysiologic and electrophysiologic mechanism of myofascial trigger points. Arch Phys Med Rehabil 1998, 9:863–872.
2. Simons DG, Travell JG, Simons LS: Travell & Simons’s Myofascial Pain and Dysfunction: the Trigger Point Manual, vol 1, edn 2. Baltimore: Williams & Wilkins; 1999.
3. Hong CZ: Myofascial trigger points: pathophysiology and correlation with acupuncture points. Acupunct Med 2000, 18:41–47.
4. Hong CZ: New trends in myofascial pain syndrome (invited review). Chin Med J (Taipei) 2002, 65:501–512.
5. Fricton JR, Auvinen MD, Dykstra D, Schiffman E: Myofascial pain syndrome: electromyographic changes associated with local twitch response. Arch Phys Med Rehabil 1985, 66:314–317.