Denlinger-Apte RL, Donny EC, Lindgren BR, Rubin N, Goodwin C, DeAtley T, Colby SM, Cioe PA, Hatsukami DK, Tidey JW. Smoking Topography Characteristics During a 6-Week Trial of Very Low Nicotine Content Cigarettes in Smokers With Serious Mental Illness. Nicotine Tob Res. 2020 07 16; 22(8):1414-1418.