By Valery P.C.   Purdie D.M.   Chang A.B.   Masters I.B.   Green A.   in Journal of Clinical Epidemiology

ISSN:0895-4356|56|7|629-635

Elsevier‎(2003)‎

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By Chang Anne B.   Gibson P. G.   Masters I. B.   Dash P.   Hills B. A.   in Journal of Asthma

ISSN:0277-0903|40|1|63-70

Informa Healthcare‎(2003)‎

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