1. The increasing problem of asthma in the United States;Gergen, P.J.; Weiss, K.B.;Am Rev Respir Dis,1992
2. Has the prevalence of asthma increased in children? Evidence from the national study of health and growth;Burney, P.; Chinn, S.; Rona, R.J.;BMJ,1973
3. Prevalence of asthma in Melbourne schoolchildren: changes over 26 years;Robertson, C.F.; Heycock, E.; Bishop, J.; Nolan, T.; Olinski, A.; Phelan, P.;BMJ,1991
4. Increasing asthma prevalence in a rural New Zealand adolescent population: 1975–1989;Shaw, R.A.; Crane, J.; O’Donnell, T.V.; Porteous, L.E.; Coleman, E.D.;Arch Dis Child,1990
5. Prevalence of asthma in Finnish young men;Haahtela, T.; Lindholm, H.; Bjorksten, F.; Koskenvuo, K.; Laitinen, L.A.;BMJ,1990