1. Increase in hospital admissions for childhood asthma: trends in referral, severity and readmissions from 1970 to 1985 in a health region of the United Kingdom;Anderson, H.R.;Thorax,1989
2. Is the prevalence of asthma increasing?;Anderson, H.R.;Arch Dis Child,1989
3. Change in use of asthma as a diagnostic label for wheezing illness in schoolchildren;Hill, R.; Williams, J.; Tattersfield, A.; Britton, J.;BMJ,1989
4. 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.;BMJ,1990
5. Changes in asthma prevalence: two surveys 15 years apart;Burr, M.L.; Butland, B.K.; King, S.; Vaughan-Williams, E.;Arch Dis Child,1989