Marugami Nagaaki, Hirai Toshiko, Yamashita Namiko, Yoshida Misuzu, Ohishi Hajime
Department of Central Endoscopy and Ultrasound, Nara Medical University, 840 Shijo-cho, Kashihara, Nara, 634-8522, Japan.
J Med Ultrason (2001). 2009 Mar;36(1):45-7. doi: 10.1007/s10396-008-0205-z. Epub 2009 Mar 14.