Sources and dates of last search: Ovid MEDLINE (R) <1950 to May week 3 2008> Pubmed/Medline – April 16/08; CT – 48 hits/22 for initial review of abstract; MRI 47 hits/ 34 for review; Nuclear – 42 hits/ 5 for review; ECHO – 162 hits/47 for review EMBASE – May 13/08 – CT – 27 hits7 for review; MRI – 31 hits 1; Nuclear – 7; ECHO – 194 hits -5 Manual search of references May 16/08 – CT – 2; MRI – 1...