Preventing youth access to tobacco products in Maryland.
D000293:Adolescent; D017677:Age Distribution; D006266:Health Education; D006801:Humans; D007221:Industry / Q000191:economics / Q000331:legislation & jurisprudence*; D008004:Licensure / Q000331:legislation & jurisprudence; D008396:Maryland / Q000453:epidemiology; D010947:Plants, Toxic; D012907:Smoking / Q000453:epidemiology / Q000331:legislation & jurisprudence*; D000074606:Smoking Prevention; D014026:Nicotiana