Funding for this research was provided by:
Chang Gung Medical Foundation (CMRPG3H1552)
Ministry of Science and Technology, Taiwan (107 2320 B 006 070 MY3)
Text and Data Mining valid from 2020-02-12
Received: 12 December 2019
Accepted: 16 January 2020
First Online: 12 February 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board (IRB) of Chang Gung Medical Foundation (ID: 201801493B0). The IRB waived the consent requirement because all patients’ personal identities are encrypted by anonymous identification numbers.
: Not applicable.
: The authors declare that they have no competing interests.