Measurement of vaginal length: reliability of the vaginal sound—a Gynecologic Oncology Group Study
D. W. Bruner, S. A. Nolte, M. S. Shahin, H. Q. Huang, E. Sobel, D. Gallup, D. Cella
International Journal of Gynecologic Cancer Sep 2006, 16 (5) 1749-1755; DOI: 10.1136/ijgc-00009577-200609000-00004