1. Prevalence of asthma and hay fever in England and Wales;Fleming, D.M.; Crombie, D.L.,1987
2. Has the management of asthma improved?;Hay, I.F.C.; Higenbottam, T.W.;Lancet,1987
3. Has the prevalence of asthma increased in children? Evidence from the national study of health and growth;Burney, P.G.J.; Chinn, S.; Rona, R.J.,1973
4. Prevalence of asthma in Melbourne schoolchildren: changes over 26 years;Robertson, C.F.; Heycock, E.; Bishop, J.; Nolan, T.; Olinsky, A.; Phelan, P.D.,1991
5. Prevalence of asthma in Finnish young men;Haahtela, T.; Lindholm, H.; Bjorksten, F.; Koskenvuo, K.; Laitinen, L.A.;BMJ,1990