[\'Stichting CardioZorg, Planetenweg 5, 2132 HN Hoofddorp, The Netherlands.\', \'Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA.\']
Orthostatic Symptoms and Reductions in Cerebral Blood Flow in Long-Haul COVID-19 Patients: Similarities with Myalgic Encephalomyelitis/Chronic Fatigue Syndrome.