1. Lee JY, Kim SH, Cho JY, et al. Color and power Doppler twinkling artifacts from urinary stones: clinical observation and phantom studies. AJR Am J Radiol. 1992;159:773–5.
2. Kolofousi C, et al. Ultrasonographic feature of kidney transplants and their complications: an imaging review. ISRN Radiol. 2012;2013:12. Article ID 480862.
3. Lachance SL, et al. Ultrasonically determined kidney transplant hypertrophy. J Urol. 1988;139(3):497–8.
4. Dudd GD III, Tublin ME, Shah A, et al. Imaging vascular complications associated with renal transplants. AJR Am J Radiol. 1991;157:449–59.
5. Rasmussen PE, Nielsen FR. Hydronephrosis during pregnancy: a literature survey. Eur J Obstet Gynecol Reprod Biol. 1988;27(3):249.