Normal Saline

The goal of this clinical trial is to learn if the experimental antibody COM701 delays the progression of ovarian cancer in participants with Relapsed Platinum Sensitive Ovarian Cancer. It will also learn about the safety of COM701. The main questions the trial aims to answer are: * Does COM701, when used as a maintenance treatment, stop or slow the progression of ovarian cancer? * Does COM701 delay the time to needing a new anti-cancer treatment? * What side effects do participants have when taking COM701? Participants will: * Visit the clinic once every 3 weeks during which the study treatment will be administered intravenously * Undergo various tests and procedures to monitor general health throughout the trial including physical examinations, vital sign measurements (heart rate, blood pressure, breathing, and body temperature), weight measurements, electrocardiography (ECG), blood and urine tests and pregnancy tests if relevant. * Undergo various tests and procedures to assess disease response throughout the trial including tumor imaging by CT scans or MRI to assess the tumor, its location, and size, and the testing of a sample of tumor tissue (from a prior biopsy or a fresh biopsy if feasible, to evaluate tumor response to treatment and to measure levels of tumor markers,

The aim of this study is to detect the effect of intraoperative intravenous magnesium sulfate on postoperative systemic inflammatory response by serum inflammatory parameters as CRP, WBCS and neutrophil count.

The global objective of this study is to establish the safety and investigate the potential treatment effect of an intravenous infusion of HB-adMSCs (Hope Biosciences adipose-derived mesenchymal stem cells) on brain structure, neurocognitive/functional outcomes, and neuroinflammation after traumatic brain injury.