Received: 2 April 2019
Accepted: 13 August 2019
First Online: 2 September 2019
Ethics approval and consent to participate
: The study was performed in accordance with the Declaration of Helsinki, approved by the Institutional Review Board of Kyoto Medical Center (2014/12/25), and registered at University hospital Medical Information Network (UMIN) center (UMIN000016772).
: Not applicable.
: NO, HT, JS, CS, and AS are employed by Kao corporation. Although NO, HT, JS, CS, and AS were involved in the design of the study and the collection of data, they did not involve in analyses or interpretation data.