Authors: N C Karalus; R T Cursons; R A Leng; C B Mahood; R P Rothwell; B Hancock; S Cepulis; M Wawatai; L Coleman Journal: Thorax Date: 1991-06 Impact factor: 9.139
Authors: A Heald; R Auckenthaler; F Borst; O Delaspre; D Germann; L Matter; L Kaiser; H Stalder Journal: J Gen Intern Med Date: 1993-12 Impact factor: 5.128