Article History
Received: 22 March 2018
Accepted: 28 May 2018
First Online: 1 June 2018
Compliance with ethical standards
:
: There are no conflicts of interest.
: The study protocol was approved by the Ethics Committee of the Tokyo Metropolitan Cancer and Infectious diseases Center Komagome Hospital and was conducted according to the Declaration of Helsinki.
: The Ethics Committee of the Tokyo Metropolitan Cancer and Infectious diseases Center Komagome Hospital waive the requirement for the investigator to obtain a signed consent form for participants.
: Not applicable.