Authors: S Jay Olshansky; Douglas J Passaro; Ronald C Hershow; Jennifer Layden; Bruce A Carnes; Jacob Brody; Leonard Hayflick; Robert N Butler; David B Allison; David S Ludwig Journal: N Engl J Med Date: 2005-03-17 Impact factor: 91.245
Authors: Simon F Thomsen; Charlotte S Ulrik; Kirsten O Kyvik; Klaus Larsen; Lars R Skadhauge; Ida Steffensen; Vibeke Backer Journal: Chest Date: 2005-06 Impact factor: 9.410