Reduced exercise capacity is associated with left ventricular systolic dysfunction in long-term survivors of allogeneic hematopoietic stem-cell transplantation. - Massey RJ; Myrdal OH; Diep PP; Burman MM; Brinch L; Gullestad LL; Ruud E; Aakhus S; Beitnes JO (Journal of clinical ultrasound : JCU, 2023)