Explore the concept of negative feedback and its role in maintaining system stability across various applications.

The use of dynamic 18F-FDG PET to determine changes in tumor metabolism requires tumor and plasma time–activity curves. Because arterial sampling is invasive and laborious, our aim was to validate ...

You can have properly indented paragraphs within list items. Notice the blank line above, and the leading spaces (at least one, but we'll use three here to also align the raw Markdown). To have a line ...