at the University of Vienna. Work in complementary medicine The world's first professor of complementary medicine, Ernst researches complementary medicine with an emphasis on efficacy and safety. His research mainly surveys systematic reviews and meta-analyses of clinical trials; the institute has not performed a clinical trial for some time due to budget constraints. He has over 700 papers published in scientific journals. He has said that about five percent of alternative medicine is backed by evidence, with the remainder being either insufficiently studied or backed by evidence showing lack of efficacy. Ernst's department at Exeter defined complementary medicine as "diagnosis, treatment and/or prevention which complements mainstream medicine by contributing to a common whole, by satisfying a demand not met by orthodoxy or by diversifying the conceptual frameworks of medicine." Ernst asserts that, in Germany and Austria, complementary techniques are mostly practiced by qualified physicians, whereas in the UK they are mainly practiced by others. He also argues that the term "Complementary and Alternative Medicine" ("CAM") is an almost nonsensical umbrella term, and that distinctions between its modalities must be made. Since his research began on alternative modalities, Ernst has been seen as "the scourge of alternative medicine" for publishing critical research. In a 2008 publication in the British Journal of General Practice, his listed treatments that "demonstrably generate more good than harm" was limited to acupuncture for nausea and osteoarthritis; aromatherapy as a palliative treatment for cancer; hypnosis for labour pain; massage, music therapy, relaxation therapy for anxiety and insomnia; and some plant extracts such as St John's wort for depression; hawthorn for congestive heart failure; guar gum for diabetes. Ernst presented at the first Global Congress on Scientific Thinking and Action, which took place on 17-20 March 2021. He spoke about the risk and dangers of alternative medicine, pointing to homeopathy and chiropractic as the most problematic areas within alternative medicine at the time. Smallwood Report In 2005, a report by economist Christopher Smallwood, personally commissioned by Prince Charles, claimed that CAM was cost-effective and should be available in the National Health Service (NHS). Ernst was initially enlisted as a collaborator on the report, but asked for his name to be removed after a sight of the draft report convinced him that Smallwood had "written the conclusions before looking at the evidence". The report did not address whether CAM treatments were actually effective and Ernst described it as "complete