Authors: K M Venables; M B Dally; A J Nunn; J F Stevens; R Stephens; N Farrer; J V Hunter; M Stewart; E G Hughes; A J Newman Taylor Journal: BMJ Date: 1989-10-14
Authors: J M Antó; J Sunyer; C E Reed; J Sabrià; F Martínez; F Morell; R Codina; R Rodríguez-Roisín; M J Rodrigo; J Roca Journal: N Engl J Med Date: 1993-12-09 Impact factor: 91.245