Dai, Zhehao
Asano, Taku http://orcid.org/0000-0001-5733-3381
Takahashi, Osamu
Komiyama, Nobuyuki
Ohde, Sachiko
Article History
Received: 5 April 2020
Accepted: 17 May 2020
First Online: 1 June 2020
Ethics approval and consent to participate
: The institutional research board of St. Luke’s International University approved the study (NO. 18-R070). All patients provided informed consent under an opt-out policy. Patients were able to opt out through telephone, mail, email, or direct visit. The opt-out policy was approved by the institutional research board, given the retrospective and observational nature of the study, where no additional invasive procedure or collection of any biological sample was required for the study.
: Not applicable.
: The authors declare that they have no competing interests.