Cleveland Clinic, Cleveland, Ohio, United States
Catharina Ziekenhuis Eindhoven, Eindhoven, Noord-Brabant, Netherlands
Medizinische Universitat Graz, Graz, Austria
Medizinische Universitaet Wien, Universitätsklinik für Chirurgie, Vienna, Austria
Royal Columbian Hospital, Vancouver, British Columbia, Canada
Microbiotest, Sterling, Virginia, United States
BioScience Laboratories, Inc., Bozeman, Montana, United States
El Camino Hospital, Mountain View, California, United States
Lithuanian University of Health Sciences, Kaunas, Lithuania
Dows Institute for Dental Research, Iowa City, Iowa, United States
College of Dentistry, Memphis, Tennessee, United States