Web-enhanced tobacco tactics with telephone support versus 1-800-QUIT-NOW telephone line intervention for operating engineers: randomized controlled trial.
Seung Hee ChoiAndrea H WaltjeDavid L RonisDevon NoonanOi Saeng HongCaroline Regina RichardsonJohn D MeekerSonia A DuffyPublished in: Journal of medical Internet research (2014)
Clinicaltrials.gov NCT01124110; http://clinicaltrials.gov/ct2/show/NCT01124110 (Archived by WebCite at http://www.webcitation.org/6TfKN5iNL).