Edentulous Mouth

• Instituto de Implantologia — Lisbon, Lisbon District, Portugal

• Case Western Reserve University Department of Periodontics — Cleveland, Ohio, United States

• Al-Azhar University Girls Branch — Cairo, Nasr City, Egypt

• Chu Clermont Ferrand — Clermont-Ferrand, France

• Valdivia — Valdivia, Chile

• Adams School of Dentistry — Chapel Hill, North Carolina, United States

Not specified

• Cairo University — Cairo, Cairo Governorate, Egypt

• University of Jordan — Amman, Jordan

• University of Iowa College of Dentistry — Iowa City, Iowa, United States