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University for Professionals in Pediatric Physical Therapy (Ms Mulder-Brouwer and
Dr Rameckers), AVANSplus, Breda, the Netherlands; Medicort, Centre for Physiotherapy
(Ms Mulder-Brouwer), Utrecht, the Netherlands; Department of Rehabilitation Medicine
(Dr Rameckers), CAPHRI, Maastricht University, and Centre of Expertise, Adelante Valkenburg,
the Netherlands; Department of Epidemiology (Dr Bastiaenen, Dr Rameckers), Research
Group Function and Rehabilitation CAPHRI, Maastricht University, Maastricht, the Netherlands.