scientific article published in May 2002

scientific article published on 20 September 2006

scientific article published on 27 November 2005

scientific article published on August 2003

scientific article

scientific article published on 01 March 2004

scholarly article by Michael Huerta et al published 11 September 2006 in Vaccine

scholarly article by Michael Huerta et al published December 2004 in Preventive Medicine

scientific article published on July 2008

scientific article published on 30 May 2009

scientific article published on July 2005

scientific article published in April 2005

scientific article published in October 2007

scientific article published on 01 September 2003

scientific article published on 20 March 2006

scientific article published on 01 September 2004

scientific article

scientific article published on 01 September 2005

scientific article published on 05 June 2006

scientific article published on 25 August 2009

scientific article published on 01 November 2007

scientific article

scientific article published on 01 January 2003

scientific article

scientific article published in May 2004

scientific article published in June 2004

scientific article published on 01 April 2006

scientific article published on July 2002

scientific article

scientific article

scientific article published on 01 April 2005

scientific article published on 01 January 2005

scientific article published on 01 August 2004