Authors: K McColl; L Murray; E El-Omar; A Dickson; A El-Nujumi; A Wirz; A Kelman; C Penny; R Knill-Jones; T Hilditch Journal: N Engl J Med Date: 1998-12-24 Impact factor: 91.245
Authors: A L Blum; N J Talley; C O'Moráin; S V van Zanten; J Labenz; M Stolte; J A Louw; A Stubberöd; A Theodórs; M Sundin; E Bolling-Sternevald; O Junghard Journal: N Engl J Med Date: 1998-12-24 Impact factor: 91.245
Authors: P Dominici; S Bellentani; A R Di Biase; G Saccoccio; A Le Rose; F Masutti; L Viola; F Balli; C Tiribelli; R Grilli; M Fusillo; E Grossi Journal: BMJ Date: 1999-08-28