<p dir="ltr">Data in the file collected on CDARS includes but not limited to: diagnoses,demographic data, drug prescriptions, procedures, laboratory tests, visits to emergency department as well as episodes of hospital visits since 1993. International Classification of Diseases, both Ninth (ICD-9) and Tenth Revision(ICD-10) were used to determine diagnostic data. Previous studies have proved that CDARS has a high coding accuracy, which enables it to be a reliable data source while conducting high-quality epidemiological research. To protect identity, records of patients are anonymized.</p><p dir="ltr"><br></p><p dir="ltr"><br></p>