diff --git a/cdm_source/cdm_source.csv b/cdm_source/cdm_source.csv
index 0fcc343..a5515e8 100644
--- a/cdm_source/cdm_source.csv
+++ b/cdm_source/cdm_source.csv
@@ -24,4 +24,7 @@ Optum’s  Clinformatics® Extended Data Mart – Socio-Economic Status (SES),OP
 PharMetrics Plus,PharMetrics,Janssen R&D,"The IQVIA™ Adjudicated Health Plan Claims Data (formerly PharMetrics Plus) - US database is comprised of fully adjudicated health plan claims data and enrollment information for commercial individuals. The information is comprised of over 70 contributing health plans and self-insured employer groups throughout the United States over the last 5 years. This anonymous, patient-centric database includes all medical and pharmacy claims data (costs and descriptive services). Claims represent payments to providers for services rendered to covered health plan individuals. The data also includes patient-level enrollment which is a record of demographic variables including eligibility status (YOB, gender, US Census region, eligibility by month). The enrollee population in the database is generally representative of the <65 years of age, commercially insured population with a subset of Commercial Medicare and Medicaid in the US with respect to both age and gender.",https://catalog.rwe.jnj.com/index#jnjsearches?dataSetUri=%2Fdataset%2F4fcfbe6d-bb08-4f15-8842-f7478277204a.xml,
 Premier Healthcare Database (PHD),PREMIER,Janssen R&D,"Premier Healthcare Database (PHD) is a nationally representative all-payer US hospital database that houses data on the inpatient and outpatient visits from non-profit, non-governmental and community and teaching hospitals and health systems. The data represent 1 in 5 inpatient hospital stays in the US. It is a visit-centric, billing database where each visit is linked with a unique billing record. The database contains information on medications, laboratory procedures, diagnostic procedures, and diagnoses with day of service for medications and procedures. ",https://catalog.rwe.jnj.com/index#jnjsearches?dataSetUri=%2Fdataset%2F27adc862-0a6d-48cd-abe9-6aec4c303b29.xml,https://ohdsi.github.io/ETL-LambdaBuilder/docs/PREMIER
 Health Verity Vaccine,Health Verity Vaccine,Janssen R&D,"The HealthVerity Marketplace COVID Vaccine cut is a data extract containing closed claims, open claims, pharmacy records, and hospital charge master data for with a COVID-related diagnosis or COVID vaccine exposure. ",None,
-Flatiron - Multiple Myeloma Core Registry, Flatiron MM,Janssen R&D,"The Flatiron - Multiple Myeloma Core Registry is a longitudinal, de-identified data set of patients diagnosed with Multiple Myleoma sourced from electronic health records (EHRs) deployed at Flatiron’s nationwide network of community oncology practices and academic cancer centers.",https://catalog.rwe.jnj.com/index#jnjsearches?dataSetUri=%2Fdataset%2F7f67e26c-f0fa-4c51-817e-672a6f6ae4ea.xml,
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+Flatiron - Multiple Myeloma Core Registry, Flatiron MM,Janssen R&D,"The Flatiron - Multiple Myeloma Core Registry is a longitudinal, de-identified data set of patients diagnosed with Multiple Myleoma sourced from electronic health records (EHRs) deployed at Flatiron’s nationwide network of community oncology practices and academic cancer centers.",https://catalog.rwe.jnj.com/index#jnjsearches?dataSetUri=%2Fdataset%2F7f67e26c-f0fa-4c51-817e-672a6f6ae4ea.xml,
+Health Verity Comprehensive Claims - Closed Claims Enrollment,Healthverity CC,Janssen R&D,"The HealthVerity Comprehensive Claims (Closed Claims Enrollment)  derived data set contains de-identified linked patient information from select private data providers participating in the HealthVerity marketplace. This data extract includes 3 data sources across medical and pharmacy closed claims data, 9 sources providing open medical claims, 8 sources providing open pharmacy claims, and 1 source providing linked death data.
+
+During the transformation to the OMOP CDM, only patients with enrollment in one of the two closed claims sources are included. The reasoning behind this is twofold. First, by using only patients with closed claims enrollment there is a high probability that any interaction with the health care system will be recorded. Data from the other linked sources, like laboratory data, becomes additional clinical context while retaining the low likelihood that adverse events would be missing from the record altogether. Second, the time during which a person is enrolled in a closed claims system provides more accurate person-time calculations.",None,
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