Expert opinion on the use of transvaginal sonography for presurgical staging and classification of endometriosis

J. Keckstein^*, M. Hoopmann, E. Merz, D. Grab, J. Weichert, S. Helmy-Bader, M. Wölfler, M. Bajka, S. Mechsner, S. Schäfer, H. Krentel, G. Hudelist

^*Corresponding author for this work