Chronic Periodontitis

• Mase Dental Clinic — Futtsu, Chiba, Japan
• Tsudanuma Olive Dental Clinic — Narashino, Chiba, Japan
• Matsunobu Dental Office — Miyako, Fukuoka, Japan
• Taniguchi Dental Clinic — Sapporo, Hokkaido, Japan

• University Hospital Ghent — Ghent, Belgium

• Department of Periodontology, M.M. College of Dental Sciences and Research. — Ambāla, Haryana, India

Not specified

• Punjab dental hospital — Lahore, Punjab Province, Pakistan

• AngioLab, Inc. — Daejeon, Daejeon Gwangyeogsi, South Korea

• Department of Dentistry, Olomouc University Hospital — Olomouc, Czech Republic, Czechia

• Lithuanian University of Health Sciences — Kaunas, Lithuania

• Marmara University — Istanbul, Maltepe, Turkey (Türkiye)

• Dental School, Aristotle University — Thessaloniki, Greece