The novel manualized RELIEVE-group treatment for burdened relatives of cancer patients: a feasibility study - Neumann, Jessica; Beckord, Jil; Hesse, Helen Samira; Martin, Carl; Mons, Carlotta; Chur, Diana; Hense, Jörg; Tewes, Mitra; Teufel, Martin; Skoda, Eva-Maria (Frontiers in Psychology, 2025)