Claire Flower has 20 years' experience as a music therapist in clinical practice, working in a range of settings with a wide variety of client groups. She works now at the Cheyne Child Development Service based at Chelsea and Westminster Hospital, London. Claire is a past Chairperson of the British Society for Music Therapy, maintains a supervision practice and continues to both write about and present her work extensively. Jos De Backer is a Professor of music therapy at Leuven University College of Arts (LUCA), campus Lemmensinstituut, Belgium and is Head of the Masters training course in music therapy. He studied music education and music therapy in Belgium and Vienna and he completed his PhD in music therapy at the University of Aalborg, Denmark. He is Head of the Music Therapy Department in the University Psychiatric Centre KULeuven, campus Kortenberg where he works as a music therapist treating young psychotic patients and patients with personality disorder. De Backer specialises in clinical improvisation, is a member of the advisory Editorial Board for the Nordic Journal of Music Therapy and of the Editorial Panel of the British Journal of Music Therapy and is a past President of the European Music Therapy Confederation. Simon Gilbertson is a trained musician and music therapist. He is a lecturer in music therapy at the Irish World Academy of Music and Dance, University of Limerick, Ireland, and was previously Head of Music Therapy at the Klinik Holthausen in Germany. After gaining his doctorate at David Aldridge's Chair for Qualitative Research in Medicine at the University Witten Herdecke he went to work with David at the Nordoff-Robbins Centre in Witten, Germany. Colwyn Trevarthen is Emeritus Professor of Child Psychology and Psychobiology at the University of Edinburgh.