. 2013 Jul 31;86(1029):20130176. doi: 10.1259/bjr.20130176
© 2013 The Authors. Published by the British Institute of Radiology
This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial 3.0 Unported License (http://creativecommons.org/licenses/by-nc/3.0/), which permits unrestricted non-commercial use, distribution and reproduction in any medium, provided the original author and source are credited