Complex sentence: Her doctors lowered her core temperature to 93 degrees Fahrenheit to preserve her brain tissue; furthermore, in addition to the standard treatment regimen, they are giving her-courtesy of the CDC-an experimental drug.
Split into simpler sentences: Her doctors lowered her core temperature to 93 degrees Fahrenheit to preserve her brain tissue. In addition to the standard treatment regimen, they are gave her, from the CDC, an experimental drug.