1. Xu Y. Treatment of facial skin diseases with acupuncture—a report of 129 cases. J Tradit Chin Med 1990;10:22–5.
2. Xu YH. Treatment of acne with ear acupuncture—a clinical observation of 80 cases. J Tradit Chin Med 1989;9:238–9.
3. Liu J. Treatment of adolescent acne with acupuncture. J Tradit Chin Med 1993;13:187–8.
4. Chen D, Jiang N, Cong X. 47 cases of acne treated by prick-bloodletting plus cupping. J Tradit Chin Med 1993;13:185–6.
5. Ding LN. 50 cases of acne treated by puncturing acupoint dazhui in combination with cupping. J Tradit Chin Med 1985;5:128.
6. Shenefelt PD. Hypnosis in dermatology. Arch Dermatol 2000;136:393–9.
7. Fulton JE Jr, Plewig G, Kligman AM. Effect of chocolate on acne vulgaris. JAMA 1969;210:2071–4.
8. Anderson PC. Foods as the cause of acne. Am Family Phys 1971;3:102–3.
9. Gaby A. Commentary. Nutr Healing 1997;Feb:1,10–1.
10. Shality AR, Smith JR, Parish LC, et al. Topical nicotinamide compared with clindamycin gel in the treatment of inflammatory acne vulgaris. Internat J Dermatol 1995;34:434–7.
11. Enshaieh S, Jooya A, Siadat AH, Iraji F. The efficacy of 5% topical tea tree oil gel in mild to moderate acne vulgaris: a randomized, double-blind placebo-controlled study. Indian J Dermatol Venereol Leprol 2007;73:22–5.
12. Hillström, L Pettersson L, Hellbe L, et al. Comparison of oral treatment with zinc sulfate and placebo in acne vulgaris. Br J Dermatol 1977;97:681–4.
13. Verma KC, Saini AS, Dhamija SK. Oral zinc sulphate therapy in acne vulgaris: a double-blind trial. Acta Dermatovener (Stockholm) 1980;60:337–40.
14. Dreno B, Amblard P, Agache P, et al. Low doses of zinc gluconate for inflammatory acne. Acta Dermatovener (Stockholm) 1989;69:541–3.
15. Michaelsson G. Oral zinc in acne. Acta Dermatovener (Stockholm) 1980;Suppl 89:87–93 [review].
16. Michaelsson G, Juhlin L, Ljunghall K. A double blind study of the effect of zinc and oxytetracycline in acne vulgaris. Br J Dermatol 1977;97:561–6.
17. Cunliffe WJ, Burke B, Dodman B, Gould DJ. A double-blind trial of a zinc sulphate/citrate complex and tetracycline in the treatment of acne vulgaris. Br J Dermatol 1979;101:321–5.
18. Thappa DM, Dogra J. Nodulocystic acne: oral gugulipid versus tetracycline. J Dermatol 1994;21:729–31.
19. Hoffman D. The Herbal Handbook: A User’s Guide to Medical Herbalism. Rochester, VT: Healing Arts Press, 1988, 23–4.
20. Leung LH. Pantothenic acid deficiency as the pathogenesis of acne vulgaris. Med Hypotheses 1995;44:490–2.
21. Kligman AM, Mills OH Jr, Leyden JJ, et al. Oral vitamin A in acne vulgaris. Preliminary report. Int J Dermatol 1981;20:278–85.
22. Snider B, Dietman DF. Pyridoxine therapy for premenstrual acne flare. Arch Dermatol 1974;110:130–1 [letter].
23. Joliffe N, Rosenblum LA, Sawhill J. Effects of pyridoxine (vit B6) on resistant adolescent acne. J Invest Dermatol 1942;5:143–8.
24. Braun-Falco O, Lincke H. The problem of vitamin B6/B12 acne. A contribution on acne medicamentosa. MMW Munch Med Wochenschr 1976;118(6):155–60 [in German].
25. Amann W. Improvement of acne vulgaris with Agnus castus (Agnolyt ™). Ther Gegenw 1967;106:124–6 [in German].
26. Amann W. Acne vulgaris and Agnus castus (Agnolyt ™).Z Allgemeinmed 1975;51:1645–58 [in German].
