My husband was diagnosed with PRES almost 3 weeks ago. He has yet to fully wake up. He has fevers...hard time breathing. He s had a ventilator for 17 days. All tests have come back with no answers.. The doctors have done catscans, mri, blood work, endoscopy, colonoscopy, called in different doctors and no one can tell us why he s still not responding. We don t know where to turn next. Can you help?