Abdullah A. Shaikh MD Department of Medicine and Radiology, Baystate Medical Center/Tufts University, Springfield, Massachusetts, USA, Syed M. Hussain MD MRCS Department of Medicine, University of Cincinnati, Cincinnati, Ohio, USA, David J. Desilets MD PhD Department of Medicine, Baystate Medical Center/Tufts University, Springfield, Massachusetts, USA, Tara M. Catanzano MD Department of Radiology, Baystate Medical Center/Tufts University, Springfield, Massachusetts, USA