Funding for this research was provided by:
Chang Gung Memorial Hospital (CPRPG3D0012, CORPG3F0931)
Text and Data Mining valid from 2019-01-31
Received: 26 September 2018
Accepted: 17 January 2019
First Online: 31 January 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: 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. The authors have nevertheless obtained ethical approval from the Chang Gung Memorial Hospital Institutional Review Board (IRB 105-1789D).
: For this type of study formal consent is not required.
: The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.