Paolo J. Knill is one of the founders of the expressive arts therapy program at Lesley University, USA and is the Provost of the European Graduate School (EGS) in Switzerland, which offers MA and PhD degrees in expressive arts therapy. Ellen G. Levine and Stephen K. Levine are co-founders of the ISIS-Canada training programme in expressive arts therapy. Ellen is the Dean of Independent Study in expressive arts therapy, education, and consulting at the EGS and Stephen is the Dean of the Doctoral Programme.
All three authors have published extensively in the field, with two of their works, Foundations of Expressive Arts Therapy and Poiesis, published by Jessica Kingsley Publishers.