1

2003

Loma Linda University, America

2

2005

Medical University of Graz,   Austria

3

2005

Tokyo Dental College

4

2006

University of Edinburgh

5

2008

Alliance for Smiles

6

2009

University of Washington,   America

7

2009

Cairo University, Egypt

8

2010

University of the Pacific,   Arthur A. Dugoni School of Dentistry

9

2013

 James Cook University, Australia

10

2014

University of Amsterdam

11

2016

Queensland University

12

2017

Faculty of Dentistry, Hong Kong University

13

2017

Division of Dentistry, Lublin  Medical University

14

2018

Faculty of Dentistry ,   Semmelweis University

15

2018

School of Dentistry, Korea  Chonnam National University

16

2018

School of Dentistry, Korea  Chosun University

17

2019

School of Dentistry, Chiang Mai  University