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This study tests whether high-dose zinc supplements can improve immune function in people with HIV who still have low CD4 counts despite successful antiretroviral therapy. 120 participants will receive either zinc or a placebo for 16 weeks. Researchers will measure changes in CD4…

This study follows about 3,600 people in Spain who have attempted suicide to learn what factors increase the risk of another attempt. Researchers will track participants over time, collect blood samples, and use smartphone tools to monitor mood changes. The goal is to find better…

This study translates and validates a Korean quality-of-life questionnaire (KOQUSS-40) for Spanish-speaking patients who had stomach cancer surgery. Researchers will enroll 505 adults who are at least one month past surgery and cancer-free. The goal is to create a reliable tool t…

This study follows 213 adults recovering from a first ischemic stroke to see if the intensity of inpatient rehabilitation (high vs. moderate) affects their functional recovery at six months. It also compares people whose stroke was linked to atrial fibrillation with those whose s…

This phase 3 trial is testing whether a person's genetic makeup influences how well they respond to two standard drugs for wet age-related macular degeneration: ranibizumab and bevacizumab. About 630 patients will receive one of the two drugs and be followed for three years. The …