1. From the Division of Laboratory Sciences, National Center for Environmental Health (B.C.B., M.P.K., M.M.-E., L.V.-B., M.G., M.B., C.R.B., K.T.C., D.C., J.C., E.C., V.R.D.J., P.E., C.F., C.H., Z.K., J.D.K., C.N., G.B.R., J.R., C.R., L.S., T.S., C.S., D.T., L.W., C.W., B.X., J.R.B., J.T., J.L.P.), Epidemic Intelligence Service, Center for Surveillance, Epidemiology, and Laboratory Sciences (I.G.), the Office of the Director (P.B.) and the Office on Smoking and Health (B.A.K.), National Center for Chronic...