@article{Pietinalho2009,
author = {Pietinalho, A. and Pelkonen, A. and Rytilä, P.},
title= {Linkage between smoking and asthma},
year = {2009},
doi = {10.1111/j.1398-9995.2009.02208.x},
volume = {64},
number = {12},
pages = {1722--1727},
}