IL6 and endometriosis: EMs, Endometriosis;<br>CA125, Cancer antigen 125;<br>CA199, Cancer antigen 199;<br>E2, Estradiol;<br>FSH, Follicle-stimulating hormone;<br>HS-CRP, High-sensitivity C-reactive protein;<br>IL-6, Interleukin-6;<br>TNF-a, Tumour necrosis factor-alpha.