It is very interesting to me how their wording over the years has become so much more affirmative.  No longer do they hedge their statements with "if" or "maybe" or "might" or "believed to be" (or something like that) when they communicate about reverse cholesterol transport. 

 

Either that is an ongoing oversight or (more likely in my mind) it means that they think they know what they have,  Could this be the reason Don called his team "hard core believers" during his time in San Francisco???  It might just be that they have learned a whole lot over the years in all the animal and human studies.