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- Year 2000 Compliance. 1998 Sep-Oct:e5
- NLM Databases. 1997 May-Jun:2
- Dates in Citations. 1997 May-Jun:2
- Class Update Date (CU) Field Expanded to Four Digits. 1997 Sep-Oct:1
- Date of Entry (DA) Field Expanded to Eight Digits. 1997 Sep-Oct:1
- Entry Month (EM) Field Expanded to Six Digits. 1997 Sep-Oct:1
- Last Revision Date (LR) Field Expanded to Eight Digits. 1997 Sep-Oct:1
- Year (YR) Field Expanded to Four Digits.
1997 Sep-Oct:1
- Year-End Processing
- 1997.
1997 Sep-Oct:1
- 1998.
1998 Sep-Oct:e2
- 1999.
1999 Nov-Dec:e2
- 2000.
2001 Jan-Feb:e2
- 2001.
2001 Nov-Dec:e2;
2001 Nov-Dec:e11
- 2002.
2002 Sep-Oct:e7;
2002 Nov-Dec:e4
- 2003.
2003 Sep-Oct:e7;
2003 Nov-Dec:e6
- 2004.
2004 Sep-Oct:e4;
2004 Nov-Dec:e9
- 2005.
2005 Sep-Oct:e4;
2005 Nov-Dec:e7
- 2006.
2006 Sep-Oct:e9;
2006 Nov-Dec:e3
- 2007.
2007 Sep-Oct:e10;
2007 Nov-Dec:e6
- 2008.
2007 Nov-Dec:e1
- 2009.
2008 Sep-Oct:e7;
2008 Nov-Dec:e20
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