PGP and endometriosis: The NFD of Anti-PGP 9.5 (+) endometriosis-associated nerve of uterosacral ligament endometriosis (EAN-USL-EM) was significantly higher than NFD of para-endometriotic nerve of uterosacral ligament endometriosis (PEN-USL-EM) as well as NFD of nerve of uterosacral ligament of control (N-USL-C) (p<0.001, p<0.001, respectively) (Fig 4A, S5 Table).