| Etiologic Risk Factors of Cardiovascular Malformations (NCT00005153) | National Heart, Lung, and Blood Institute (NHLBI) | 1980-12-01 |
| Genetics of Wilms' Tumor and/or the Associated Conditions of Aniridia, Hemihypertrophy, and Genitourinary Anomalies (NCT00503893) | M.D. Anderson Cancer Center | 1980-12-01 |
| Systolic Hypertension in the Elderly Program (SHEP) (Pilot Study) (NCT00000499) | National Heart, Lung, and Blood Institute (NHLBI) | 1980-09-01 |
| Visual Stimulus and Eye Movement (NCT00001172) | National Eye Institute (NEI) | 1980-08-26 |
| Percutaneous Transluminal Coronary Angioplasty (PTCA) Registries I, II, and III and the Dynamic Registry (NCT00005677) | University of Pittsburgh | 1980-08-01 |
| Dietary Analyses in the Nurses' Health Study, Nurses' Health Study II, and Health Professionals Follow-Up Study (NCT03366532) | Harvard School of Public Health (HSPH) | 1980-08-01 |
| Nurses' Health Study (Cardiovascular Component) (NCT00005152) | Brigham and Women's Hospital | 1980-08-01 |
| Pawtucket Heart Health Program (NCT00005151) | National Heart, Lung, and Blood Institute (NHLBI) | 1980-08-01 |
| Minnesota Heart Health Program (NCT00005150) | University of Minnesota | 1980-07-01 |
| Bariatric Surgery Registry (NCT01055054) | Virginia Commonwealth University | 1980-07-01 |
| Studies of In Vitro B Lymphocyte Responses in Subjects Receiving Tetanus Toxoid Booster Immunization (NCT00001173) | National Institute of Allergy and Infectious Diseases (NIAID) | 1980-06-01 |
| Cholesterol-Lowering Atherosclerosis Study (CLAS) (NCT00000599) | National Heart, Lung, and Blood Institute (NHLBI) | 1980-06-01 |
| Control of Hypertension by Non-Pharmacologic Means (NCT00000498) | National Heart, Lung, and Blood Institute (NHLBI) | 1980-04-01 |
| Antecedents of the Type A Behavior Pattern (NCT00005328) | University of Pittsburgh | 1980-04-01 |
| Genetic and Environmental Determinants of Hypertension (NCT00005149) | University of Utah | 1980-02-01 |
| Dietary Intervention Study for Hypertension (DISH) (NCT00000497) | University of Mississippi Medical Center | 1980-01-01 |
| Examining the Long-Term Risks of Oophorectomy (NCT00655447) | Parker, William H., M.D. | 1980-01-01 |
| Hepatitis C in Adults Who Underwent Congenital Heart Surgery Before Screening (NCT00359099) | Emory University | 1980-01-01 |