What is the fine-grained topic of the following text: Researchers measured blood serum IGF-1 levels in 15 patients with newly diagnosed untreated PD and 139 healthy elderly individuals an fund: "The IGF-1 level was higher in patients with PD compared with healthy participants..."
The scientists concluded: "Serum IGF-1 monitoring may be valuable in the diagnosis of PD and for the identification of individuals with a putatively increased risk for PD." Only return the topic.
The role of serum IGF-1 levels in diagnosing Parkinson's Disease.