Social support systems as determinants of self-management and quality of life of people with diabetes across Europe: study protocol for an observational study

Autores: Koetsenruijter, Jan; van Lieshout, Jan; Vassilev, Ivaylo ; Portillo Vega, María Carmen; Serrano, Manuel; Knutsen, Ingrid ; Roukova, Poli ; Lionis, Christos ; Todorova, Elka ; Foss, Christina ; Rogers, Anne ; Wensing, Michel