"And cigarettes they continued to self-administer over a longer period, even as they became adults," said Edward Levin, a professor of psychiatry and behavioral sciences at Duke and one of the authors of a study published in this week's journal of Psychopharmacology cigarettes online.

The Duke research reinforces cheap cigarettes discount the need to keep cigarettes away from teens, Levin said, because 88 percent of smokers in the United States took their first puff before age 18, and 60 percent started before age 14 cheap cigarettes.

Aging in an instant

One of cheap cigarettes the youths who participated in Ribisl's study, a girl named Carla who was 11 when she was enlisted to make the purchases, said she was surprised at how easy it was to buy smokes cigarettes online.

"I clicked the button and aged seven years," she said of ordering the online cigarettes marlboro cigarettes.

The children who worked with Ribisl were carefully screened and participated after numerous meetings involving them, their parents and researchers. online cigarettes The four teens placed the orders and made the purchases at the researchers' offices, under the direction of the study leaders. All were cleared for participation by the county's district attorney cigarettes online online cigarettes buy cigarettes marlboro cigarettes.

Ribisl said he cheap cigarettes discount is doing additional research into the burgeoning market of cigarettes online Internet  cigarette sales. This year, he said, he has identified 353 Internet vendors . Sales will exceed $5 billion in 2005, according to Forrester Research, which analyzes trends in technology.