A mixed methods approach towards understanding key disease characteristics associated with the progression from RRMS to SPMS: Physicians’ and patients’ views

•The mechanisms of transition from RRMS to SPMS are poorly understood.•This was the first stage of development of a novel tool to assess the signs of progression.•Both qualitative and quantitative methods were used to determine tool content.•Physicians confirmed the usefulness of this tool in clinic...

Ausführliche Beschreibung