- Correspondence to Dr Felix Distelmaier, Department of General Pediatrics, Neonatology and Pediatric Cardiology, University Children's Hospital, Heinrich-Heine-University, Moorenstr. 5, Düsseldorf D-40225, Germany;
- Received November 2, 2012
- Revised March 20, 2013
- Accepted May 15, 2013
- First published June 14, 2013.
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