Document is current

Article History

Received: 24 July 2017

Accepted: 20 February 2018

First Online: 16 April 2018

Ethics approval and consent to participate

: The Ethical Board of the Université catholique de Louvain advised that informed consent was not required for analysis of these mortality data collected for purposes other than this study and in the public domain.

: Not applicable.

: The authors declare that they have no competing interests.

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