Article History
Received: 18 February 2019
Revised: 24 June 2019
Accepted: 19 July 2019
First Online: 1 August 2019
Compliance with ethical standards
: The study protocol was reviewed and approved by the Institutional Review Board of the Dalin Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Taiwan (Nos. B10104020 and B10004021).
: None.