Verkuijl Nienke, Perkins Marian, Fazel Mina
Department of Psychiatry, University of Oxford, Oxford OX3 7JX, UK.
Child and Adolescent Neuropsychiatry Service, Oxford Health NHS Foundation Trust, Oxford, UK.
BMJ. 2015 May 20;350:h2168. doi: 10.1136/bmj.h2168.