1. Ernst, E. Complementary medicine: Scrutinising the alternatives. Lancet 341, 1626 (1993).
2. Hutchison, A., McColl, E., Christine, M. & Riccalton, C. Health outcomes for primary and out-patient care: An editorial overview. (Harwood Academic Publishers, 1996).
3. Leung, G. M., Wong, I. O. L., Chan, W. S., Choi, S. & Lo, S. V. The ecology of health care in Hong Kong. Social Science & Medicine 61, 577–590 (2005).
4. Lam, C. L. K. et al. Utilisation patterns of primary health care services in Hong Kong: does having a family doctor make any difference? Hong Kong Medical Journal 17, S28–S32 (2011).
5. Bodeker, G. et al. WHO global atlas of traditional, complementary and alternative medicine, http://www.who.int/iris/handle/10665/43108 (2005).