1. New drugs in respiratory disease;Flenley, D.C.;BrMedJ,1983
2. New drugs in respiratory disease;Flenley, D.C.;BrMedJ,1983
3. Asthma mortality in England and Wales: evidence for a further increase;Burney, P.G.J.;Lancet,1986
4. Prevalence of asthma and hay fever in England and Wales;Fleming, D.M.; Crombie, D.L.;BrMedJ,1987
5. Are asthma mortality rates changing?;Stewart, C.J.; Nunn, A.J.;Brj Dis Chest,1985