To provide you with an accurate and relevant set of 19 non-patent literature (NPL) documents that meet your study requirements, it would be essential to clarify your specific study requirements (1.1 to 1.5) in detail. Nonetheless, I can give you a general outline of how to approach your analysis based on your criteria.
### Search Criteria
1. **Publication Date**: Documents must be published before September 27, 2004.
2. **Coverage of Study


