Authors: D Vaira; M Miglioli; P Mulè; J Holton; M Menegatti; M Vergura; G Biasco; R Conte; R P Logan; L Barbara Journal: Gut Date: 1994-03 Impact factor: 23.059
Authors: E Hentschel; G Brandstätter; B Dragosics; A M Hirschl; H Nemec; K Schütze; M Taufer; H Wurzer Journal: N Engl J Med Date: 1993-02-04 Impact factor: 91.245