World Endometriosis Society consensus on the classification of endometriosis by Johnson, NP, Hummelshoj, L, Adamson, GD, Keckstein, J, Taylor, HS, Abrao, MS, Bush, D, Kiesel, L, Tamimi, R, Sharpe-Timms, KL, Rombauts, L, Giudice, LC, World Endometriosis Society Sao Paulo Consortium