HUGHES, J. R., KEELY, J. P., NIAURA, R. S., OSSIP-KLEIN, D. J., RICHMOND, R. L. & SWAN, G. E.
2003. Measures of abstinence in clinical trials: issues and recommendations. Nicotine & Tobacco Research, 5, 13-25.
HUGHES, J. R., KEELY, J. P., NIAURA, R. S., OSSIP-KLEIN, D. J., RICHMOND, R. L. & SWAN, G. E.
2003. Measures of abstinence in clinical trials: issues and recommendations. Nicotine & Tobacco Research, 5, 13-25.