Comment on

• Effectiveness of pneumococcal polysaccharide vaccine in older adults.

  Jackson LA, Neuzil KM, Yu O, Benson P, Barlow WE, Adams AL, Hanson CA, Mahoney LD, Shay DK, Thompson WW; Vaccine Safety Datalink. Jackson LA, et al. N Engl J Med. 2003 May 1;348(18):1747-55. doi: 10.1056/NEJMoa022678. N Engl J Med. 2003. PMID: 12724480
• Quality of care in U.S. hospitals as reflected by standardized measures, 2002-2004.

  Williams SC, Schmaltz SP, Morton DJ, Koss RG, Loeb JM. Williams SC, et al. N Engl J Med. 2005 Jul 21;353(3):255-64. doi: 10.1056/NEJMsa043778. N Engl J Med. 2005. PMID: 16034011
• Care in U.S. hospitals--the Hospital Quality Alliance program.

  Jha AK, Li Z, Orav EJ, Epstein AM. Jha AK, et al. N Engl J Med. 2005 Jul 21;353(3):265-74. doi: 10.1056/NEJMsa051249. N Engl J Med. 2005. PMID: 16034012
• Improving the quality of hospital care in America.

  Romano PS. Romano PS. N Engl J Med. 2005 Jul 21;353(3):302-4. doi: 10.1056/NEJMe058150. N Engl J Med. 2005. PMID: 16034018 No abstract available.