Please answer the following question: Facts:   - known for: subpersonality    - fields: psychology      - name: john rowan    - image size: 200px    - nationality: english    - alma mater: middlesex university   Based on these bullet points, write a short biography describing the life of john rowan -lrb- psychologist -rrb- .
Answer:
john rowan is an english author , counselor , psychotherapist and clinical supervisor who has worked in exploring transpersonal psychology , and has written about the concept of subpersonality .