Abnormal deviation in the measurement of residual urine volume using a portable ultrasound bladder scanner: a case report - Zhu, Xueqiong; Zou, Liliang; Yao, Zhao; Chen, Zuobing (Translational Andrology and Urology; Vol 10, No 7 (July 28, 2021): Translational Andrology and Urology, 2021)