Authors: M Soler; N Malats; M Porta; E Fernandez; L Guarner; A Maguire; J L Pinõl; J Rifà; A Carrato Journal: Dig Dis Sci Date: 1999-12 Impact factor: 3.199
Authors: M A Bruijnzeels; J C van der Wouden; M Foets; A Prins; W J van den Heuvel Journal: J Epidemiol Community Health Date: 1998-01 Impact factor: 3.710