National Clinical Cohort Collaborative (formerly National COVID Cohort Collaborative) (N3C) and NIH RECOVER

Long COVID research in the National Clinical Cohort Collaborative (formerly National COVID Cohort Collaborative) (N3C) and NIH RECOVER, using harmonized multi-site electronic health record (EHR) data. Contributions include machine-learning phenotyping, ICD-10-based characterization, and target trial emulations of antiviral treatment.