- Correspondence to Dr Martine Karine Francine Docx, Department of Paediatrics Chronic Paediatric Diseases, Queen Paola Children's Hospital, Antwerp, Belgium, Lindendreef 1, Antwerp 2020, Belgium;
- Received April 6, 2015
- Revised May 15, 2015
- Accepted June 8, 2015
- First published June 25, 2015.
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