BibTex format
@article{Agaku:2015:10.1016/j.ypmed.2015.01.014,
author = {Agaku, IT and Awopegba, AJ and Filippidis, FT},
doi = {10.1016/j.ypmed.2015.01.014},
journal = {PREVENTIVE MEDICINE},
pages = {86--92},
title = {The impact of inter-survey differences in the definition of current smokeless tobacco use on comparability of US national and state-specific prevalence estimates, 2009-2011},
url = {http://dx.doi.org/10.1016/j.ypmed.2015.01.014},
volume = {74},
year = {2015}
}