Authors: C Joseph; D Morgan; R Birtles; C Pelaz; C Martín-Bourgón; M Black; I Garcia-Sanchez; M Griffin; N Bornstein; C Bartlett Journal: Eur J Epidemiol Date: 1996-06 Impact factor: 8.082
Authors: J Blanquer; R Blanquer; R Borrás; D Nauffal; P Morales; R Menéndez; I Subías; L Herrero; J Redón; J Pascual Journal: Thorax Date: 1991-07 Impact factor: 9.139