Comment on

• A potential decline in life expectancy in the United States in the 21st century.

  Olshansky SJ, Passaro DJ, Hershow RC, Layden J, Carnes BA, Brody J, Hayflick L, Butler RN, Allison DB, Ludwig DS. Olshansky SJ, et al. N Engl J Med. 2005 Mar 17;352(11):1138-45. doi: 10.1056/NEJMsr043743. N Engl J Med. 2005. PMID: 15784668