Sex- and race-related differences among smokers using a national helpline are not explained by socioeconomic status.
Andoh J, Verhulst S, Ganesh M, Hopkins-Price P, Edson B, Sood A. Sex- and race-related differences among smokers using a national helpline are not explained by socioeconomic status. J Natl Med Assoc. 2008 Feb; 100(2):200-7.