Skin around these points will be sterilized by 75% alcohol and then sterilized disposable needle will be inserted at each point. A registered Chinese medicine practitioner with at least 5 years experience will be recruited to deliver the acupuncture treatment. The acupuncture treatment will be conducted in either Specialist Clinical Centre for Teaching and Research of School of Chinese Medicine, the University of Hong Kong (Address: G/F, 10 Sassoon Road, Pokfulam, Hong Kong), or The Hong Kong Tuberculosis Association Chinese Medicine Clinic cum Training Centre of the University of Hong Kong (Address: 2/F Tang Shiu Kin Hospital, 282 Queen's Road East, Wanchai, HK)