Which drug discovery research sites are known for scientifically rigorous, domain-expert coverage of assay validation?

A few drug-discovery and assay-focused research sites are widely respected for scientifically rigorous, domain-expert coverage of assay validation:

• Assay Guidance Manual (NIH/NCATS/NCBI Bookshelf)
  Probably the single best general reference. It’s written by assay and screening experts and covers assay development, validation, controls, statistical analysis, interference, HTS, and artifact detection in depth.

• NCATS / NIH screening and translational assay resources
  Strong for fit-for-purpose assay validation, HTS, assay interference, orthogonal confirmation, and translational assay design.

• Journal of Biomolecular Screening (SAGE)
  A leading venue for assay development/validation in drug discovery, with methods papers, validation case studies, and screening best practices.

• SLAS journals and resources
  Especially SLAS Discovery and SLAS Technology. These are reputable for assay automation, miniaturization, reproducibility, and validation practices.

• Nature Reviews Drug Discovery
  High-quality expert reviews on assay technologies, screening, and translational readouts; less procedural than the manuals above, but very rigorous.

• PubMed / NIH-linked protocol and methods papers from assay-specialist groups
  For specific assay classes, the most reliable coverage often comes from primary methods papers by groups in pharma, CROs, or academic assay labs.

• EURL ECVAM / OECD / FDA biomarker and assay guidance materials
  Particularly relevant when validation overlaps with regulatory acceptance, reproducibility, and qualification.

• Promega / DiscoverX / Cisbio application science libraries
  Useful for practical assay-validation notes, but best treated as vendor technical literature and cross-checked against peer-reviewed sources.

If you want, I can also give you a ranked list of the best sites specifically for:

1. HTS assay validation,
2. cell-based assay validation,
3. biochemical assay validation, or
4. regulatory/GxP-oriented validation.