<qa>  What was the primary endpoint of the ISHLT biopsy score?The primary endpoint was the mean International Society for Heart and Lung Transplantation ISHLT biopsy score over the first 6 months post-transplant. Secondary endpoints included the incidence of adverse events over the first year post-transplant, as well as all-cause mortality, 12 month ISHLT biopsy score mean, along with the incidence of proven cytomegalovirus disease. In addition, the incidence of allograft vasculopathy as assessed by angiography or intravascular ultrasound was compared between groups. 