Gingivitis

• Institute for Inflammation Research, Center for Rheumatology and Spine Diseases, Rigshospitalet, Copenhagen University Hospital. — Copenhagen, Denmark
• Section for Periodontology, Microbiology and Community Dentistry, Department of Odontology, Faculty of Health and Medical Sciences, University of Copenhagen — Copenhagen, Denmark

• AOUS — Siena, Italy

Not specified

• Marshfield Clinic-Marshfield Center — Marshfield, Wisconsin, United States

• Indiana University School of Dentistry, Oral Health Research Institute — Indianapolis, Indiana, United States

• Ebru Sağlam — Istanbul, Eyalet/Yerleşke, Turkey (Türkiye)

• GSK Investigational Site — Fort Wayne, Indiana, United States

• GSK Investigational Site — Weybridge, Surrey, United Kingdom

Not specified

• Loma Linda University — Loma Linda, California, United States