Funding for this research was provided by:
Key Technologies Research and Development Program (2017YFC0907601, 2017YFC0907605)
Received: 23 October 2019
Revised: 5 February 2020
Accepted: 14 February 2020
First Online: 7 March 2020
Compliance with ethical standards
: Written informed consent was obtained from all patients at enrollment. Ethics approval for the registry was obtained from the Medical Ethics Committee of Peking Union Medical College Hospital (PUMCH, JS-2038).