  |
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| from 1949 to 11/17/2008 in PubMed Central |
| from 06/01/1997 to present in ScienceDirect Journals |
| from 1996 to 2002 in Wiley InterScience Journals |
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| from 2003 to present in Wiley InterScience Journals Potentially to be cancelled for 2010. |
| from 2003 to present in Wiley InterScience Journals Potentially to be cancelled for 2010. |
| from 2003 to present in Wiley InterScience Journals Potentially to be cancelled for 2010. |
| from 1995 to 2002 in ScienceDirect Journals |
| from 1997 to 2 years ago in Blackwell-Synergy Free Collection |
| from 1997 to 2 years ago in Wiley-Blackwell Open Access Backfiles Potentially to be cancelled for 2010. |
| from 1967 to 2005 in Annual Reviews Back Volumes |
| from 12/01/1985 to 12/31/2005 in Academic Search Elite |
| from 01/01/1993 to 01/01/2003 in Academic OneFile |
| from 01/01/1993 to 01/01/2003 in Expanded Academic ASAP |
| from 01/01/1993 to 01/01/2003 in General OneFile |
| from 01/01/1993 to 01/01/2003 in General Reference Center Gold |
| from 01/01/1993 to 01/01/2003 in Health Reference Center Academic |
| from 01/01/1995 to 12/31/2005 in General Science Full Text |
| from 01/01/1995 to 12/31/2005 in Wilson OmniFile: Full Text Mega Edition |
| from 01/01/1996 to 12/01/2005 in ProQuest Research Library |
| from 2006 to present in Annual Reviews |
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| from 01/01/2005 to 1 year ago in Wilson OmniFile: Full Text Mega Edition |
| from 06/01/1998 to 08/01/2002 in Academic OneFile |
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| from 06/01/1998 to 08/01/2002 in General Reference Center Gold |
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| from 12/01/1999 to 08/31/2002 in Business & Company Resource Center |
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| from 01/01/1997 to 1 year ago in ProQuest Research Library |
| from 02/01/1997 to 1 year ago in Wilson OmniFile: Full Text Mega Edition |
| from 1999 to present in Portland Press Electronic Journals |
| from 2000 to 1 year ago in Freely Accessible Science Journals |
| from 1995 to 2008 in ScienceDirect Journals |
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| from 01/01/2001 to present in Academic Search Elite |
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| from 12/01/2006 to present in Academic OneFile |
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| from 01/01/2007 to present in Academic OneFile |
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| from 03/01/2001 to 1 year ago in ProQuest Research Library |
| from 2008 to 1 year ago in PubMed Central |
| from 2002 to present in Oxford Journals |
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| from 02/01/2002 to 1 year ago in ProQuest Research Library |
| from 2008 to 1 year ago in PubMed Central |
| from 01/01/1999 to present in Nature Journals Online |
| from 1999 to 5 calendar years ago in Freely Accessible Science Journals |
| from 04/01/2001 to 1 year ago in Academic OneFile |
| from 04/01/2001 to 1 year ago in Health Reference Center Academic |
| from 1995 to 2008 in ScienceDirect Journals |
| from 2004 to present in Wiley InterScience Journals |
| from 1997 to present in Blackwell-Synergy Potentially to be cancelled for 2010. |
| from 01/01/1999 to 1 year ago in Academic Search Elite |
| from 01/01/1999 to 1 year ago in Health Source: Nursing/Academic Edition Potentially to be cancelled for 2010. |
| from 2001 to present in Mary Ann Liebert Online |
| from 12/01/2007 to present in Academic OneFile |
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| from 01/01/1998 to 1 year ago in ProQuest Research Library |
| from 1998 to 08/31/2008 in Karger Online |
| from 2001 to present in Directory of Open Access Journals |
| from 2001 to present in PubMed Central |
| from 2001 to 2005 in Wiley InterScience Journals |
| from 01/01/2005 to present in Academic OneFile |
| from 1995 to present in ScienceDirect Journals |
| from 2002 to present in Karger Online Potentially to be cancelled for 2010. |
| from 1995 to 2008 in ScienceDirect Journals |
| from 1996 to present in Wiley InterScience Journals |
| from 1990 to present in Mary Ann Liebert Online Potentially to be cancelled for 2009. |
| from 1994 to present in Directory of Open Access Journals |
| from 1996 to present in Oxford Journals |
| from 2007 to present in PubMed Central |
| from 2000 to 1 year ago in Freely Accessible Science Journals |
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| from 07/01/2000 to present in Nature Journals Online |
| from 07/15/2000 to 1 year ago in ProQuest Research Library |
| from 1996 to present in Wiley InterScience Journals |
| from 01/01/1998 to 1 year ago in Academic Search Elite |
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| from 02/01/1998 to 12/31/2004 in Academic Search Elite |
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| from 1947 to 2005 in JSTOR |
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| from 12/01/1992 to 08/01/1998 in Expanded Academic ASAP |
| from 12/01/1992 to 08/01/1998 in General OneFile |
| from 02/01/1999 to 10/31/1999 in General Science Full Text |
| from 02/01/1999 to 10/31/1999 in Wilson OmniFile: Full Text Mega Edition |
| from 2000 to present in BioOne.1 |
| from 01/01/2000 to 11/30/2008 in BioOne.1 Full Text |
| from 01/01/2007 to 1 year ago in Academic Search Elite |
| from 04/01/2002 to 1 year ago in ProQuest Research Library |
| from 2000 to 2002 in Wiley InterScience Journals |
| from 1998 to present in Freely Accessible Science Journals |
| from 1999 to present in Directory of Open Access Journals |
| from 1995 to 2000 in Contemporary Women's Issues |
| from 02/13/1995 to present in LexisNexis Academic |
| from 02/13/1995 to present in ProQuest Research Library |
| from 07/31/2008 to present in Academic OneFile |
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| from 07/31/2008 to present in Health Reference Center Academic |
| from 03/01/1987 to present in Cold Spring Harbor Laboratory Press |
| from 03/01/1987 to present in EBSCOhost EJS |
| from 03/01/1987 to 6 months ago in HighWire Press (Free Journals) |
| from 1996 to present in HighWire Press |
| from 01/01/1997 to present in Single Journals |
| from 1997 to 6 months ago in PubMed Central |
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| from 1996 to present in Directory of Open Access Journals |
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| from 1999 to 5 calendar years ago in Freely Accessible Science Journals |
| from 09/01/1999 to present in Nature Journals Online |
| from 05/01/2001 to 1 year ago in Academic OneFile |
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| from 1996 to present in Wiley InterScience Journals |
| from 1996 to 6 months ago in Blackwell-Synergy Free Collection |
| from 1996 to 6 months ago in Wiley-Blackwell Open Access Backfiles |
| from 01/01/1996 to 6 months ago in HighWire Press (Free Journals) |
| from 01/01/1998 to 1 year ago in Academic Search Elite |
| from 01/01/1998 to 1 year ago in Health Source: Nursing/Academic Edition |
| from 2000 to present in Wiley InterScience Journals |
| from 03/01/1995 to 12/15/1999 in ScienceDirect Journals |
| from 1996 to present in Wiley InterScience Journals |
| from 12/01/2007 to 12/01/2008 in Academic OneFile |
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| from 1997 to 2001 in Cambridge Journals Online |
| from 02/01/2001 to 12/31/2007 in ProQuest Research Library |
| in EBSCOhost EJS |
| from 1916 to 3 months ago in PubMed Central |
| from 01/01/1916 to 6 months ago in HighWire Press (Free Journals) |
| from 1988 to present in Single Journals |
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| from 10/01/2004 to present in ProQuest Research Library |
| from 1998 to present in Directory of Open Access Journals |
| from 1998 to present in Freely Accessible Science Journals |
| from 2002 to present in Directory of Open Access Journals |
| from 2003 to present in Freely Accessible Science Journals |
| from 1969 to present in PubMed Central |
| from 2009 to present in Directory of Open Access Journals |
| from 01/05/2009 to present in Academic OneFile |
| from 01/05/2009 to present in Expanded Academic ASAP |
| from 01/05/2009 to present in Health Reference Center Academic |
| from 02/01/1997 to present in LexisNexis Academic (selected full-text only) |
| from 04/01/2005 to 6 months ago in General Science Full Text |
| from 04/01/2005 to 6 months ago in Wilson OmniFile: Full Text Mega Edition |
| from 01/01/2006 to 6 months ago in Academic OneFile |
| from 01/01/2006 to 6 months ago in General OneFile |
| from 01/01/2006 to 6 months ago in Health Reference Center Academic |
| from 2001 to present in BioMedCentral |
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| from 02/21/2007 to present in Academic OneFile |
| from 1996 to present in Freely Accessible Science Journals |
| from 08/01/1991 to 1 year ago in Freely Accessible Science Journals |
| from 08/01/1995 to present in Cold Spring Harbor Laboratory Press |
| from 08/01/1995 to 6 months ago in HighWire Press (Free Journals) |
| from 1996 to present in HighWire Press |
| from 01/01/1997 to present in EBSCOhost EJS |
| from 1997 to 6 months ago in PubMed Central |
| from 2000 to 2001 in BioMedCentral |
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| from 1995 to present in ScienceDirect Journals |
| from 02/02/1998 to present in ProQuest Research Library |
| from 12/07/1998 to present in LexisNexis Academic |
| from 1999 to 2000 in Contemporary Women's Issues |
| from 01/19/2001 to present in Academic OneFile |
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| from 01/01/2002 to 06/07/2006 in LexisNexis Academic |
| from 01/01/2002 to 04/30/2006 in Business Source Premier |
| from 01/01/2004 to present in Academic OneFile |
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| from 01/01/2004 to present in General OneFile |
| from 2005 to present in Directory of Open Access Journals |
| from 05/01/1961 to present in Directory of Open Access Journals |
| from 04/01/1993 to present in Academic OneFile |
| from 04/01/1993 to present in Expanded Academic ASAP |
| from 04/01/1993 to present in General OneFile |
| from 04/01/1993 to present in General Reference Center Gold |
| from 04/01/1993 to present in Health Reference Center Academic |
| from 02/01/1994 to present in ProQuest Research Library |
| from 06/01/1998 to present in General Science Full Text |
| from 06/01/1998 to present in Wilson OmniFile: Full Text Mega Edition |
| from 2001 to present in Project MUSE - Premium Collection |
| from 06/01/2005 to present in Academic Search Elite |
| from 1990 to present in Mary Ann Liebert Online |
| from Spring 1990 to present in EBSCOhost EJS |
| from 12/01/2007 to present in Academic OneFile |
| from 12/01/2007 to present in Health Reference Center Academic |
| from 1997 to present in EBSCOhost EJS Potentially to be cancelled for 2010. |
| from 1997 to present in SpringerLink Contemporary (1997 - Present) Potentially to be cancelled for 2010. |
| from 05/01/1990 to 02/01/2002 in Freely Accessible Science Journals |
| from 1998 to present in Karger Online |
| from 01/01/1998 to 1 year ago in ProQuest Research Library |
| from 1996 to present in HighWire Press |
| from 1996 to present in Oxford Journals |
| from 1996 to 1 year ago in Freely Accessible Science Journals |
| from 01/01/1996 to 1 year ago in HighWire Press (Free Journals) |
| from 01/01/1998 to present in EBSCOhost EJS |
| from 1998 to 2004 in IngentaConnect |
| from 2008 to 1 year ago in PubMed Central |
| from 1996 to present in Wiley InterScience Journals Potentially to be cancelled for 2010. |
| from 2004 to present in EBSCOhost EJS 1999-2001 is also available online.Potentially to be cancelled for 2010. |
| from 1997 to present in EBSCOhost EJS |
| from 01/01/1997 to present in SpringerLink Contemporary (1997 - Present) |
| from 1991 to 2005 in JSTOR |
| from 2003 to 2008 in BioOne.1 |
| from 02/01/2003 to 09/30/2008 in BioOne.1 Full Text |
| from 2002 to present in Directory of Open Access Journals |
| from 01/01/2003 to present in Academic OneFile |
| from 01/01/2003 to present in Expanded Academic ASAP |
| from 01/01/2003 to present in General OneFile |
| from 01/01/2003 to present in Health Reference Center Academic |
| from 1989 to present in Single Journals |
| from 1998 to present in Wiley InterScience Journals |
| from 01/01/2001 to 1 year ago in ProQuest Research Library |
| from 1988 to 2 years ago in Blackwell-Synergy Free Collection |
| from 1988 to 2 years ago in Wiley-Blackwell Open Access Backfiles |
| from 1999 to present in Wiley InterScience Journals |
| from 03/01/1984 to 1 year ago in MasterFILE Premier |
| from 03/01/1985 to 1 year ago in Academic Search Elite |
| from 06/01/1993 to 06/01/2009 in Academic OneFile |
| from 06/01/1993 to 06/01/2009 in Expanded Academic ASAP |
| from 06/01/1993 to 06/01/2009 in General OneFile |
| from 06/01/1993 to 06/01/2009 in Health Reference Center Academic |
| from 03/01/1994 to present in ProQuest Research Library |
| from 03/01/1995 to present in Social Sciences Full Text |
| from 03/01/1995 to present in Wilson OmniFile: Full Text Mega Edition |
| from 1996 to present in HighWire Press |
| from 1996 to present in Oxford Journals |
| from 01/01/1996 to 1 year ago in HighWire Press (Free Journals) |
| from 1998 to 2004 in IngentaConnect |
| from 03/01/2005 to 1 year ago in ProQuest Research Library |
| from 2008 to 1 year ago in PubMed Central |
| from 1995 to present in ScienceDirect Journals |
| from 01/01/1998 to 1 year ago in Academic Search Elite |
| from 01/01/1998 to 1 year ago in Health Source: Nursing/Academic Edition |
| from 1964 to 3 years ago in PubMed Central |
| from 09/01/1964 to present in BMJ Journals |
| from 09/01/1964 to 12/31/2005 in HighWire Press (Free Journals) |
| from 1996 to present in HighWire Press |
| from 1999 to present in EBSCOhost EJS |
| from 03/01/2001 to 03/01/2004 in Academic OneFile |
| from 03/01/2001 to 03/01/2004 in Expanded Academic ASAP |
| from 03/01/2001 to 03/01/2004 in General OneFile |
| from 03/01/2001 to 03/01/2004 in Health Reference Center Academic |
| from 2005 to present in Directory of Open Access Journals |
| from 2005 to present in PubMed Central |
| from 12/01/2005 to present in Academic OneFile |
| from 12/01/2005 to present in Expanded Academic ASAP |
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| from 12/01/2005 to present in Health Reference Center Academic |
| from 1997 to present in EBSCOhost EJS |
| from 04/01/2003 to 1 year ago in Academic Search Elite |
| from 01/01/2005 to 1 year ago in Wilson OmniFile: Full Text Mega Edition |
| from 10/01/1997 to 1 year ago in ProQuest Research Library |
| from 01/01/2002 to 1 year ago in Social Sciences Full Text |
| from 01/01/2002 to 1 year ago in Wilson OmniFile: Full Text Mega Edition |
| from 01/01/2002 to present in HighWire Press |
| from 01/01/2002 to 1 year ago in Freely Accessible Science Journals |
| from 01/01/2002 to 1 year ago in HighWire Press (Free Journals) |
| from 2008 to 1 year ago in PubMed Central |