Funding for this research was provided by:
Ministry of Science and Technology, Taiwan (108-2321-B-182A-005)
Chang Gung Memorial Hospital (OMRPG3I0011)
Received: 22 December 2019
Accepted: 18 February 2020
First Online: 2 March 2020
Ethics approval and consent to participate
: All the authors agreed to participate in the writing of the manuscript. This is a review article. Therefore, no ethics committee that is required to approve any study. There is also no animal study involved and no approved consent from a client is required.
: All the authors have viewed the manuscript and agree with the submission of this manuscript. This is a review article. Therefore, no individual data in any form is included inside the manuscript. No consent from any such person is required. “Not applicable” for individual data.
: The authors declare that they have no competing interests.