Meltzer RS, Adsumelli R, Risher WH, Hicks GL, Stern DH, Shah PM, Wojtczak JA, Lustik SJ, Gayeski TE, Shapiro JR, Carstensen EL. "Lack of lung hemorrhage in humans after intraoperative transesophageal echocardiography with ultrasound exposure conditions similar to those causing lung hemorrhage in laboratory animals." Journal of the American Society of Echocardiography : official
publication of the American Society of Echocardiography. 1998 Jan 0; 11(1):57-60.