1. Queen Elizabeth Psychiatric Hospital; Department of Psychiatry; Mindelsohn Way Edgbaston Birmingham UK B15 2QZ
2. University of Birmingham- Queen Elizabeth Psychiatric Hospital; Addictive Behaviours Centre; 120-122 Corporation Street Birmingham UK B4 6SX
3. Institute of Psychiatry, King's College London; National Addiction Centre; 4 Windsor Walk Denmark Hill London UK SE5 8AF