Periodontitis

• 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

• Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University — Ratchathewi, Bangkok, Thailand
• Department of Medicine, Rajavithi Hospital — Ratchathewi, Bangkok, Thailand
• Mahidol University Faculty of Dentistry — Ratchathewi, Bangkok, Thailand

• Gazi University — Ankara, Cankaya, Turkey (Türkiye)

• Gaziosmanpasa University — Tokat Province, Turkey (Türkiye)

Not specified

Not specified

• Periodontal and Implant Associates, Inc. — Cullman, Alabama, United States
• Periodontics and Implant Dentistry — Aurora, Colorado, United States
• Clinique Paro Excellence — Montreal, Quebec, Canada
• Universitätsmedizin der Johannes Gutenberg Universität Mainz — Mainz, Germany

• Regenerative solutions — Fullerton, California, United States
• University of Michigan School of Dentistry — Ann Arbor, Michigan, United States
• University of Pennsylvania — Philadelphia, Pennsylvania, United States
• Perio Health Professionals — Houston, Texas, United States

Not specified

• Ordu University — Ordu, Turkey (Türkiye)