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subscription/membership/fee required Elsevier Science https://linkinghub.elsevier.com/retrieve/pii/S0022-3476(18)31824-9
Stress free resource MedlinePlus Health Information https://medlineplus.gov/stress.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=30723014.ui
subscription/membership/fee required ClinicalKey https://www.clinicalkey.com/content/playBy/pii?v=S0022-3476(18)31824-9
Full text from free resource Research Portal of the University of Turku https://urn.fi/URN:NBN:fi-fe2021042822888