@article{Sporik1991,
author = {Sporik, R. and Holgate, S.T. and Cogswell, J.J.},
title= {Natural history of asthma in childhood: A birth cohort study},
year = {1991},
doi = {10.1136/adc.66.9.1050},
journal = {Archives of Disease in Childhood},
volume = {66},
number = {9},
pages = {1050--1053},
}