Cohort Profile: the National Health Insurance Service-National Sample Cohort (Nhis-Nsc), South Korea

Cohort Profile: The National Health Insurance Service–National Sample Cohort (NHIS-NSC), South Korea Juneyoung Lee, Ji Sung Lee, Sook-Hee Park, Soon Ae Shin and KeeWhan Kim* Department of Biostatistics, College of Medicine, Korea University, Seoul, Korea, Clinical Research Center, Asian Medical Center, Seoul, Korea, Big Data Steering Department, National Health Insurance Service, Seoul, Korea and Department of Applied Statistics, Korea University Sejong Campus, Sejong City, Korea