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Authors: R A Pauwels; C G Löfdahl; D S Postma; A E Tattersfield; P O'Byrne; P J Barnes; A Ullman Journal: N Engl J Med Date: 1997-11-13 Impact factor: 91.245
Authors: A Lahdensuo; T Haahtela; J Herrala; T Kava; K Kiviranta; P Kuusisto; E Perämäki; T Poussa; S Saarelainen; T Svahn Journal: BMJ Date: 1996-03-23