FGF7 and graft versus host disease: However, a phase I/II randomized placebo-controlled study, originally designed to assess the effect of 40–60 μg/kg KGF per day on graft versus host disease (GVHD) in 100 patients undergoing allogenic hematopoietic stem cell transplantation, showed no effect of KGF on absolute lymphocyte count [196, 197].