This is absolutly fascinating. It involves Big Tobacco and for me, as I would think for others it''s new information. Who would have thought, the research about stress and type A behavior was started by Big Tobacco and for nefarious reasons. http://www.npr.org/blogs/health/2014/07/07/325946892/the-secret-history-behind-the-science-of-stress While, I'm not sure if this invaladates all research on stress, the article is not only eye opening but also a refreshing look at reseach about stress and the fact that it may not be as big a contributor to health as previously thought. It will be interesting to see how if this impacts, if any, future studies or how the medical profession views "stress related illnesses. Barb .