1. Research group IPE, Lifelong Learning, Education and Assessment Research Network (LEARN), Research Institute SHARE, University Medical Center Groningen University of Groningen Groningen The Netherlands
2. Research Group Healthy Ageing Allied Health Care and Nursing Hanze University of Applied Sciences Groningen The Netherlands
3. Center for Dentistry and Dental Hygiene, University Medical Center Groningen University of Groningen Groningen The Netherlands
4. Department of Obstetrics and Gynaecology, University Medical Center Groningen University of Groningen Groningen The Netherlands