First-in-human (FIH), microdosing, non-randomized, clinical trial to investigate binding of positron emission tomography tracer [68Ga]Ga-DOTA-Cys-ATH001 targeting platelet derived growth factor receptor β in healthy subjects as compared to patients with metabolic dysfunction-associated steatohepatitis (MASH) and Primary Sclerosing Cholangitis binding (PSC, liver) and patients with fibrostenotic Crohn’s disease (CD, gastrointestinal tract [GI])