By Lesley Braun, PhD, BPharm, DipAppSciNat, Associate Professor of Integrative Medicine (Hon) National institute of Complementary Medicine, University of Western Sydney, NSW, Australia Senior Research Fellow (Hon), Monash/Alfred Psychiatric Research Centre, VIC, Australia and Marc Cohen, MBBS(Hons), PhD, BMedSc(Hons), FAMAC, FICAE, Professor at School of Health Sciences, RMIT University, Melbourne