TGFB1 and endometriosis: HIF-1- and TGF-β-mediated upregulation of LDHA and PDK1 expression induced by hypoxia and oxidative stress is an adaptive phenomenon in endometriosis (Qi et al. 2014, Young et al. 2014, 2016, Marianna et al. 2017, Horne et al. 2019).