title: Authors' reply.
authors.affiliation: George Kirov, MRCPych, PhD, MRC Centre for Neuropsychiatric Genetics and Genomics, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff. Email: Kirov@cardiff.ac.uk; Maria Atkins, MRCPsych, Cardiff and Vale University Health Board, Whitchurch Hospital, Cardiff, UK.
authors.forename: George
authors.initials: G
authors.lastname: Kirov
authors.affiliation: George Kirov, MRCPych, PhD, MRC Centre for Neuropsychiatric Genetics and Genomics, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff. Email: Kirov@cardiff.ac.uk; Maria Atkins, MRCPsych, Cardiff and Vale University Health Board, Whitchurch Hospital, Cardiff, UK.
authors.forename: Maria
authors.initials: M
authors.lastname: Atkins