Correspondence to: Matthew L. Springer, PhD, Division of Cardiology, Box 0124, University of California, San Francisco, San Francisco, CA 94143. Email

E-mail Address: [email protected]

https://orcid.org/0000-0002-6689-8234

Division of Cardiology (L.M., D.D.H., R.D., P.R., P.G., M.L.S.), University of California, San Francisco.

Center for Tobacco Control Research and Education (S.F.S., M.L.S.), University of California, San Francisco.

Cardiovascular Research Institute (M.L.S.), University of California, San Francisco.