Characteristics of smokers accessing the Puerto Rico Quitline.
Ortiz AP, D?az-Toro EC, Calo WA, Correa-Fern?ndez V, Cases A, Santos-Ortiz MC, Mazas C, Mej?a L, Wetter DW. Characteristics of smokers accessing the Puerto Rico Quitline. P R Health Sci J. 2008 Sep; 27(3):213-9.