- Correspondence to Professor Ulrich Thome, Division of Neonatology, Department of Women's and Children's Medicine, University Hospital of Leipzig, Liebigstrasse 20a, Leipzig 04103, Germany
- Received 7 July 2016
- Revised 29 November 2016
- Accepted 9 December 2016
- Published in print 1 September 2017.
- Published online 18 August 2017.
- Published first 13 January 2017.
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