PT - JOURNAL ARTICLE AU - Anderson, H R TI - Is the prevalence of asthma changing? AID - 10.1136/adc.64.1.172 DP - 1989 Jan 01 TA - Archives of Disease in Childhood PG - 172--175 VI - 64 IP - 1 4099 - http://adc.bmj.com/content/64/1/172.short 4100 - http://adc.bmj.com/content/64/1/172.full SO - Arch Dis Child1989 Jan 01; 64