Text and Data Mining valid from 2020-04-20
Received: 24 January 2020
Accepted: 17 March 2020
First Online: 20 April 2020
Ethics approval and consent to participate
: All studies cited in this manuscript are published and have stated that they had ethics approval and obtained proper informed content from participants.
: All authors met criteria for authorship and read and approved the final version of this manuscript.
: The authors declare that they have no competing interests.