Sarratt Gallery at Vanderbilt exhibits a collection of posters from the early days of ad wars this month. For fans of Mad Men, this one is a must-see. The exhibit is a traveling show compiled by Stanford University. For those who don’t spend every Sunday evening with Don Draper, suffice it to say that the advertising industry faced a tough challenge when the hazards of smoking became increasingly difficult to hide. Tobacco companies thus turned to salesmen and artists to help sway public opinion about the dangers of their wares. Perhaps most striking are the images of doctors that ad companies used to make cigarettes seem less deadly. Not a Cough in a Carload is compelling on many levels, and the posters evoke a mid-century modern aesthetic that is cool, attractive and just as seductive as ever.