Leiden University Medical Center

This phase 2 trial tests whether low sodium oxybate (Xywav) can reduce nighttime cluster headache attacks in people with chronic cluster headache. About 52 participants will receive either the drug or a placebo for 16 weeks. The main goal is to see if the drug lowers the number o…

This study tests whether a short course of belimumab, a drug used for lupus, can improve detection of immune cells that cause transplant rejection. The goal is to help highly sensitized kidney transplant candidates—people whose immune systems are very picky about donor organs—get…

This study looks at whether people who have had a ruptured brain aneurysm also have an abdominal aortic aneurysm (a bulge in the main belly artery) that they don't know about. About 233 participants will get a painless belly ultrasound to check. The goal is to see how common this…

This study looks at whether a new tool helps young adults (ages 18-30) with type 1 diabetes and their doctors work together better to make care plans that fit daily life. Researchers will compare usual doctor visits with visits using the tool, and interview participants afterward…