Text and Data Mining valid from 2017-08-24
Received: 22 February 2017
Accepted: 3 August 2017
First Online: 24 August 2017
Compliance with ethical standards
: This manuscript was entirely funded by the authors, and no pharmaceutical companies were informed of or were involved in the review. All authors contributed to this review with equal efforts. The authors have no potential conflict of interest directly relevant to the contents of the manuscript.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.