. Author manuscript; available in PMC: 2015 Sep 1.
Published in final edited form as: Ultrasound Med Biol. 2014 Jul 9;40(9):2172–2182. doi: 10.1016/j.ultrasmedbio.2014.03.018
© 2014 World Federation for Ultrasound in Medicine and Biology. Published by Elsevier Inc. All rights reserved.