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Table 3 Example of a flat table exported from the REDCap database with biomarker data yet to be entered

From: Merging clinical chemistry biomarker data with a COPD database - building a clinical infrastructure for proteomic studies

patient_id redcap_event_name N ca leuco hb mono
100001 visit_1      
100002 visit_1      
100001 visit_2      
100002 exacerbation_1