| Buspirone Treatment of Anxiety in Williams Syndrome (NCT04807517) | Massachusetts General Hospital | 2021-08-01 |
| Cognitive and Behavioral Therapy of Anxiety in Williams Syndrome (NCT03827525) | University Hospital, Montpellier | 2019-08-29 |
| Parent and Infant Inter(X)Action Intervention (PIXI) (NCT03836300) | RTI International | 2018-11-30 |
| Williams Syndrome Strength, Hormones, Activity & Adiposity, DNA Programming, Eating Study (NCT03758651) | Massachusetts General Hospital | 2018-10-01 |
| Cooperative Parent Mediated Therapy in Children With Fragile X Syndrome and Williams Syndrome (NCT04610424) | Bambino Gesù Hospital and Research Institute | 2017-05-17 |
| WS-SAVE Study (Williams Syndrome Skin and Vessel Elasticity Study) (NCT02692846) | National Heart, Lung, and Blood Institute (NHLBI) | 2017-03-03 |
| Impact of Elastin Mediated Vascular Stiffness on End Organs (NCT02840448) | National Heart, Lung, and Blood Institute (NHLBI) | 2016-12-02 |
| Williams Syndrome (WS) and Supravalvar Aortic Stenosis (SVAS) DNA and Tissue Bank (NCT02706639) | National Heart, Lung, and Blood Institute (NHLBI) | 2016-05-11 |
| Response Inhibition Training for Children With Williams Syndrome (NCT02212314) | University of Wisconsin, Milwaukee | 2014-05-01 |
| Fat Distribution and Glucose Metabolism in Williams Syndrome (NCT01864304) | Massachusetts General Hospital | 2013-12-01 |
| Defining the Brain Phenotype of Children With Williams Syndrome (NCT01132885) | National Institute of Mental Health (NIMH) | 2011-01-23 |
| Rare Disease Patient Registry & Natural History Study - Coordination of Rare Diseases at Sanford (NCT01793168) | Sanford Health | 2010-07-01 |
| The Psychiatric and Cognitive Phenotypes in Velocardiofacial Syndrome (NCT00768820) | The Chaim Sheba Medical Center | 2001-05-01 |
| Study of Phenotype and Genotype Correlations in Patients With Contiguous Gene Deletion Syndromes (NCT00004351) | National Institute of Neurological Disorders and Stroke (NINDS) | 1999-09-01 |