Clinical Trials Research on Rare Diseases: U

• Ulcerative Proctitis   7 studies
• Unverricht-Lundborg Disease   4 studies
• Urachal Cancer   2 studies
• Urea Cycle Disorders   29 studies
• Urethral Cancer   60 studies
• Usher Syndrome   7 studies
• Usher Syndrome Type 3   1 study
• Usher Syndrome, Type 1   1 study
• Usual Interstitial Pneumonia   126 studies
• Uterine Sarcoma   115 studies
• Uveal Diseases   428 studies