TY - JOUR A1 - Sporik, R. A1 - Holgate, S.T. A1 - Cogswell, J.J. T1 - Natural history of asthma in childhood: A birth cohort study Y1 - 1991 DO - 10.1136/adc.66.9.1050 JF - Archives of Disease in Childhood VL - 66 IS - 9 SP - 1050 EP - -1053 ER -