Authors: T Haahtela; M Järvinen; T Kava; K Kiviranta; S Koskinen; K Lehtonen; K Nikander; T Persson; K Reinikainen; O Selroos Journal: N Engl J Med Date: 1991-08-08 Impact factor: 91.245
Authors: V Backer; S Groth; A Dirksen; N Bach-Mortensen; K K Hansen; E M Laursen; D Wendelboe Journal: Eur Respir J Date: 1991-10 Impact factor: 16.671