Review doi: 10.3390/jcm10092000. Affiliations Affiliations 1 Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, 00029 Helsinki, Finland. 2 Sleep Well Research Programme, University of Helsinki, 00016 Helsinki, Finland. 3 Department of Pharmacology, University of Helsinki, 00016 Helsinki, Finland. PMID: 34066965 PMCID: PMC8124518 DOI: 10.3390/jcm10092000 Free PMC article Item in Clipboard Review J Clin Med.