1. Definitions Working Group National Institutes of and surrogate endpoints : preferred definitions and conceptual framework;Biomarkers Health Biomarkers Clin Pharmacol Ther,2001
2. Statistical methods for assessment of added usefulness of new biomarkers;Pencina;Clin Chem Lab Med,2010
3. Definitions Working Group National Institutes of and surrogate endpoints : preferred definitions and conceptual framework;Biomarkers Health Biomarkers Clin Pharmacol Ther,2001
4. Statistical methods for assessment of added usefulness of new biomarkers;Pencina;Clin Chem Lab Med,2010