Document is current

Article History

Received: 15 February 2018

Accepted: 18 April 2018

First Online: 10 May 2018

Ethics approval and consent to participate

: N/A

: All authors are responsible for the contents and have read and approved the manuscript for the submission to Orphanet Journal of Rare Diseases.

: The authors declare that they have no competing interests.

: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.