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Article History

Received: 8 May 2019

Accepted: 4 October 2019

First Online: 26 October 2019

Compliance with ethical standards

:

: All authors declare that they have no significant competing financial, professional, or personal interests that might have influenced the performance or presentation of the work described in this manuscript.

: As it is a narrative review based on published data, no additional ethical approval is provided.

: Informed consent was obtained from all individual participants included in the studies reported in this review.

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