[1] Maastricht Univ, Dept Physiotherapy, Med Ctr, POB 5800, NL-6202 AZ Maastricht, Netherlands
[2] Maastricht Univ, CAPHRI Sch Publ Hlth & Primary Care, POB 616, NL-6200 MD Maastricht, Netherlands
[3] Avans Univ Appl Sci, POB 90-116, NL-4800 RA Breda, Netherlands
[4] Maastricht Univ, Med Ctr, Dept Internal Med, Div Gen Med & Clin Geriatr Med, POB 5800, NL-6202 AZ Maastricht, Netherlands
[5] Maastricht Univ, Dept Anat & Embryol, POB 616, NL-6200 MD Maastricht, Netherlands
[6] Maastricht Univ, Dept Epidemiol, POB 616, NL-6200 MD Maastricht, Netherlands