Kumagai, Akiko
Willems, Guy
Franco, Ademir
Thevissen, Patrick
Article History
Received: 5 April 2018
Accepted: 31 July 2018
First Online: 11 August 2018
Compliance with ethical standards
: Ethical approval was provided by the Ethical Committee of the School of Dentistry at Iwate Medical University under reference no. 01237 according to the Declaration of Helsinki regarding human experimentation.