For more than a decade, Kristin Comella, the chief science officer of US Stem Cell Inc., took to conference stages and appeared at health expos evangelizing the benefits of her company’s experimental treatments. By extracting fat through liposuction, then filtering out adult stem cells and reinjecting them into troubled tissue, US Stem Cell could achieve striking improvements, she said, be it to a torn knee, overstressed lungs, or a body suffering from Parkinson’s.
