Received: 7 February 2019
Accepted: 16 July 2019
First Online: 29 July 2019
Ethics approval and consent to participate
: The coordinating office of JaRPAC is located at the NCCHD, Tokyo, Japan, where central approval was obtained from the ethical committee (EC). Obtaining local EC approval is also required in all hospitals to join the registry. According to the ethical guidelines for epidemiological studies by the Ministry of Health, Labor and Welfare (Japan), informed consent from participants for participating in the study can be waived because the registry collects only existing data and does not require any bio-samples from patients. However, each participating hospital discloses the information about this registry, which enables patients to opt out from the registry. The study was finally approved by the steering committee of JaRPAC, and anonymized data were provided for analysis by the JaRPAC office.
: Not applicable.
: The authors declare that they have no competing interests.