This 2003 comment criticized a Federal Trade Commission prosecution of several Washington state physician groups:
 
"CVT fails to see the utility of the FTC spending thousands of dollars to achieve the same result as the Washington attorney general. While we recognize the FTC’s view that all physician joint contracting is a subject of federal jurisdiction (a view we do not necessarily accept, only acknowledge), the Washington action coupled with the pending private litigation only serves to undermine the Commission’s discretionary exercise of its authority. Given the substance of this case involves the actions of 10 physicians (24 if you include all SSY members), the Republic would certainly have endured leaving this matter to state authorities." 
 
You can read the entire comment at this link.