Smokers invariably have worse health status, of course, than non-smokers. And one of the reasons that I did this work is because they have implications for outcome in orthopedic surgery. Smokers generally have poor outcome but generally they all get lumped together in orthopedic studies. But there clearly is – there is a lot of theory of the effect of interaction between smoking, depression, and pain perception - but there are lot of factors, again, coming into whether people report back pain or not.