Ethics approval and consent to participate
Because the interventions used in the treatment are the same as reported in physiotherapeutic guidelines, and only the treatment delivery differs, the Medical Ethical Committee of the HU University of Applied Sciences declared that this study was not covered by the Dutch Medical Research Involving Human Subject Act (WMO) and therefore did not require medical ethical approval, with reference number: 81_000_2018. Written informed consent was obtained from all participating patients. All physiotherapists gave verbal consent to use their data pseudonymously. The Medical Ethical Committee of the HU University of Applied Sciences approved the informed consent procedure, with reference number: 81_000_2018. All methods were carried out in accordance with relevant guidelines and regulations.