- Correspondence to Dr Tim Cheetham, Department of Paediatric Endocrinology, Institute of Genetic Medicine, Newcastle University, Office block 1, Floor 3, The Great North Children's Hospital, Newcastle-Upon-Tyne NE1 4LP, UK;
- Received 8 June 2016
- Revised 12 August 2016
- Accepted 16 August 2016
- Published online 17 February 2017.
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