Epidemiological study projects

experimental method designed to reduce bias, typically accomplished by randomly allocating subjects to two or more groups, with one being a control group

study with repeated observations over time

volunteer clinical org

cardiovascular cohert study

study (1951 to 2001) into smoking and lung cancer

Registered Nurse's of MN. 2019

Longterm biobank study of 500,000 people

article

1980s observational study on diet in China