- Correspondence to Dr Markus Wilken, Institute for Pediatric Feeding Tube Management and Weaning, Hohlweg 4, Siegburg D-53721, Germany;
- Received 20 December 2012
- Revised 6 June 2013
- Accepted 29 June 2013
- Published in print 16 July 2013.
- Published online 17 July 2013.
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