Authors: C Jokinen; L Heiskanen; H Juvonen; S Kallinen; K Karkola; M Korppi; S Kurki; P R Rönnberg; A Seppä; S Soimakallio Journal: Am J Epidemiol Date: 1993-05-01 Impact factor: 4.897
Authors: M J Fine; T E Auble; D M Yealy; B H Hanusa; L A Weissfeld; D E Singer; C M Coley; T J Marrie; W N Kapoor Journal: N Engl J Med Date: 1997-01-23 Impact factor: 91.245
Authors: J Almirall; I Morató; F Riera; A Verdaguer; R Priu; P Coll; J Vidal; L Murgui; F Valls; F Catalan Journal: Eur Respir J Date: 1993-01 Impact factor: 16.671