Correction: Associations between changes in precerebral blood flow and cerebral oximetry in the lower body negative pressure model of hypovolemia in healthy volunteers

• Jonny Hisdal, 
• Svein Aslak Landsverk, 
• Ingrid Elise Hoff, 
• Ove Andreas Hagen, 
• Knut Arvid Kirkebøen, 
• Lars Øivind Høiseth