- Correspondence to Dr Raoul C Hennekam, Department of Paediatrics, H7-236, Academic Medical Centre, P.O. Box 22660, Amsterdam 1100 DD, The Netherlands;
- Received May 1, 2015
- Revised December 10, 2015
- Accepted December 14, 2015
- First published January 14, 2016.
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- Data supplement 1 - Online supplement
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