Akdeniz University, Antalya, Turkey
Koc University Hospital, Istanbul, Turkey
Giresun University Faculty of Medicine-Giresun Training and Research Hospital, Giresun, Turkey
Faculty of Dentistry, Al Sherouk, Cairo, Egypt
Roswell Park Cancer Institute, Buffalo, New York, United States
University of Wisconsin, Madison, Wisconsin, United States
Region Hospital Randers, Randers, Denmark
Region hospital Gødstrup, Herning, Denmark
Region Hospital Viborg, Viborg, Denmark
Saint Pauls Hospital, Vancouver, British Columbia, Canada