Received: 8 April 2019
Accepted: 11 June 2019
First Online: 27 June 2019
Ethics approval and consent to participate
: The protocol for this study was reviewed and approved by our Institutional Review Board (No17-26). The committee members were Honda, Aoshiba, Furukawa, Ikegami, Suzuki, Higashitani, Aoyagi, Nagase, Maneyakma, Utsugi, Kurusu, Ookubo, Takahashi, Sugawara, and Yamamoto (titles omitted).
: Written consents for publication were obtained from all study participants.
: The authors have no financial or personal relationships with other persons or organizations that may lead to a conflict of interest in this work.