1Flemish-Netherlands Geriatric Oral Research Group (BENECOMO), Ghent, Belgium, Nijmegen, Netherlands, E-mail: jos.Schols@gmail.com
2Department of Social Dentistry and Behavioral Sciences, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit, Amsterdam, Netherlands, E-mail: jos.Schols@gmail.com
3Department of Family Medicine and Health Service Research, Maastricht University, Maastricht, Netherlands, E-mail: jos.Schols@gmail.com
4Center for Special Care in Dentistry, Amsterdam, Netherlands, E-mail: jos.Schols@gmail.com
5Royal Dutch Dental Association (KNMT), Utrecht, Netherlands, E-mail: jos.Schols@gmail.com