1 – Year Results of Endovenous Laser Therapy With 1940nm Laser; Longer Wavelength and Lesser Energy Density (Level 2 Study). (December 2019) - Schmedt, Claus-Georg; Dikic, Slobodan; Setia, Abhay; Marius, Mircea; Demhasaj, Sahit; Stroka, Ronald; Schmitz-Rixen, Thomas