Authors: G Bjune; E A Høiby; J K Grønnesby; O Arnesen; J H Fredriksen; A Halstensen; E Holten; A K Lindbak; H Nøkleby; E Rosenqvist Journal: Lancet Date: 1991-11-02 Impact factor: 79.321
Authors: J C de Moraes; B A Perkins; M C Camargo; N T Hidalgo; H A Barbosa; C T Sacchi; I M Landgraf; V L Gattas; H de G Vasconcelos; I M Gral Journal: Lancet Date: 1992-10-31 Impact factor: 79.321