Reflexology Trial", Simon Singh states that if indeed the hands and feet "reflect" the internal organs, reflexology might be expected to explain how such "reflection" was derived from the process of Darwinian natural selection; but Singh says that no argument or evidence has been adduced. In the United Kingdom, reflexology is coordinated on a voluntary basis by the Complementary and Natural Healthcare Council (CNHC). Registrants are required to meet Standards of Proficiency outlined by Profession Specific Boards, but since CNHC is voluntary anyone practicing can describe themselves as a reflexologist. When the CNHC began admitting reflexologists, a skeptic searched for, and
Reflexology Australian government named reflexology as a practice that would not qualify for insurance subsidy, saying this step would "ensure taxpayer funds are expended appropriately and not directed to therapies lacking evidence". Reviews from 2009 and 2011 have not found evidence sufficient to support the use of reflexology for any medical condition. A 2009 systematic review of randomized controlled trials concludes: "The best evidence available to date does not demonstrate convincingly that reflexology is an effective treatment for any medical condition." There is no consensus among reflexologists on how reflexology is supposed to work; a unifying theme is the idea that