PHILADELPHIA--(BUSINESS WIRE)--Moss Rehabilitation Research Institute (MRRI), the research arm of MossRehab, one of the world’s leading clinical rehabilitation centers, has launched an ambitious research study to investigate how the sleep drug zolpidem might restore consciousness for patients in the vegetative state. Led by John Whyte, MD, PhD, Director of MRRI, the new research study is the largest and most rigorously designed study to date that will examine zolpidem as a promising possibility for patients with disorders of consciousness.