Analysis
Descriptive statistics were used to describe participant characteristics. All quantitative data analyses were performed using SPSS Version 25 (IBM Corp., Armonk, NY, USA). All qualitative data were audio-recorded and transcribed verbatim by MvT. Using data from the first focus group, first three of nine patient and first three of eight physiotherapist interviews, MvT and CK independently identified codes, grouped them into meaningful categories and subsequently categorized them into main themes using ATLAS.ti 9 for Windows. Codes and main themes from these interviews were discussed between MvT and CK until consensus was reached. After the consensus meeting, MvT independently analyzed the rest of the interviews and focus groups. Transcripts and findings were not returned to participants for comments or corrections and field notes were not made, because data were felt to be straightforward and unlikely to be misinterpreted.