Training of the intervention providers 
and fidelity monitoring
rheumatic and musculoskeletal diseases, TND
APPENDIX
Training of the intervention providers was organized via outreach visits to each center by the research team (ALSS, IK, TND) who gave lectures, arranged workshops, and delivered the study materials. To minimize potential contamination of the control condition, the visits were arranged approximately one week before each center shifted to the intervention condition. During the trial, the centers received supervisory support from the chief study coordinator (ALSS), and regular project meetings were held that addressed study logistics and implementation.To ensure and monitor that the BRIDGE-intervention was delivered according to the study protocol, a fidelity check list was used by the health professionals at each rehabilitation center (Appendix Table 2). Additionally, the patients reported their needs for follow-up after rehabilitation discharge, whether plans were made to meet these needs, and whether they had received follow-up, or not, in their municipality of residence. A quality indicator set for the rehabilitation of patients with rheumatic and musculoskeletal diseases