Text and Data Mining valid from 2019-06-01
Received: 4 February 2019
Revised: 20 May 2019
Accepted: 25 May 2019
First Online: 1 June 2019
Compliance with ethical standards
: Livia S. Mazzoli M.D. declares that she has no conflict of interest. Carla N. Urata, M.D. declares that she has no conflict of interest. Niro Kasahara, M.D. declares that he has no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.