This article has been retracted by the authors. Although the patients originally gave consent to publication of their cases and images, they withdrew this consent shortly after publication. The article is no longer available online in order to protect patient confidentiality. The author apologizes for the inconvenience.
This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.