Authors: A van Rie; R Warren; M Richardson; T C Victor; R P Gie; D A Enarson; N Beyers; P D van Helden Journal: N Engl J Med Date: 1999-10-14 Impact factor: 91.245
Authors: Robin M Warren; Thomas C Victor; Elizabeth M Streicher; Madalene Richardson; Nulda Beyers; Nicolaas C Gey van Pittius; Paul D van Helden Journal: Am J Respir Crit Care Med Date: 2003-12-30 Impact factor: 21.405