Michael Weinstein, MD, FACS, FCCP, speaks with Michael Matthay, MD, Professor of Medicine and Anesthesia at the University of California at San Francisco and a Senior Associate at the Cardiovascular Research Institute. Dr. Matthay discusses “Stem Cell Therapies in Critical Illness,” along with some thoughts on the treatment of ARDS and clinical trials in general. This discussion derives from a presentation at the 43rd Critical Care Congress in San Francisco, California.