During your scheduled surgery, the researcher will also collect just over a teaspoon of blood at the beginning of the surgery for an additional endothelial risk assessment and a small sample of lung tissue, if available. Tissue removed during long surgery is usually thrown away if it is not needed for diagnosis and or treatment purposes. The lung tissue sample collected for this research study will only be taken from lung tissue that is to be discarded. The lung tissue will be used to determine the amount of a naturally occurring substance thought to play a role in recruiting blood cells to repair injured lung tissue.