Fig. 2.

HPC, CFU-Hill and ECFC counts in peripheral venous blood of patients with pulmonary hypertension, with and without treatment. a Number of CD34+ hematopoietic progenitor cells (HPC) determined by FACS analysis according to patient group. No difference is observed between the treated and non treated patients (P = 0.80). b Number of CFU-Hill colonies determined by cell culture according to patient group. No difference is observed between the treated and non treated patients (P = 0.89). c Number of ECFC determined by cell culture according to patient group. No difference is observed between the treated and non treated patients (P = 0.15)