- Correspondence to Professor Stian Lydersen, Regional Centre for Child and Youth Mental Health and Child Welfare, Norwegian University of Science and Technology, Olav Kyrres gate 9, P.O. Box 890, MTFS, Trondheim N-7491, Norway;
- Received June 30, 2014
- Revised August 20, 2014
- Accepted September 13, 2014
- First published September 26, 2014.
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