Dr Arturo Ezquerro is a London-based consultant psychiatrist, psychoanalytic psychotherapist and group analyst, and a senior assessor and trainer at the Institute of Group Analysis. He is an honorary member of the International Attachment Network and the World Association of International Studies and is the former Head of NHS Medical Psychotherapy Services for Brent. Ezquerro has over a hundred publications in five languages, including Encounters with John Bowlby (Routledge).

Dr María Cañete is a consultant psychotherapist and group analyst. She trained at the Tavistock Clinic and is a senior trainer at the Institute of Group Analysis. She is a former director of NHS group psychotherapy programmes for University College, St Charles and Mile End Hospitals, London. Cañete has published widely in English, German and Spanish.