Critical Care Department, King Saud Medical City, Riyadh, Saudi Arabia. University of South Carolina, School of Medicine, Columbia, SC, USA. Electronic address: mike@blaivas.org. Research and Innovation Centre, King Saud Medical City, Riyadh, Saudi Arabia. Critical Care Department, King Saud Medical City, Riyadh, Saudi Arabia; University of South Carolina, School of Medicine, Columbia, SC, USA. Electronic address: karakitsosdimitrios@gmail.com.