The perfect crime? CCSVI not leaving a trace in MS

Here is a link to an abstract of an article in the Journal of Neurology about a small German study where NO CCSVI was found in MS patients: Pubmed article.  Given what a high percentage of MS patients were found to have in much larger clinical studies (from about 60% to 97%) it makes you wonder if the neurologists doing this study even knew what they were looking for, doesn't it?  It makes you wonder if any vascular and/or blood flow specialists were even involved in the study.