Authors: M P Ryan; J French; S al-Mahdawi; P Nihoyannopoulos; J G Cleland; C M Oakley; P S Harper; A Clarke; J Davis; L Grigg Journal: BMJ Date: 1995-04-01
Authors: S Wiggins; P Whyte; M Huggins; S Adam; J Theilmann; M Bloch; S B Sheps; M T Schechter; M R Hayden Journal: N Engl J Med Date: 1992-11-12 Impact factor: 91.245