KDR and type 1 diabetes mellitus: Interestingly, a previous study comparing control participants versus individuals with T1DM found a lower EPC count and a negative correlation (r = −0.429, p = 0.006) between glucose variability and EPC count when EPCs were identified by the CD34+/KDR+/CD133+ phenotype, but this finding was not confirmed when EPCs were identified by the CD34+/KDR+ immunophenotype (25).