?:authorAffiliation
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[\'Central City Clinical Hospital, 3 Letniya str., Kaliningrad 236005, Russian Federation, e-mail: k.f.borchev@gmail.com.\', \'Kaliningrad State Technical University, 1 Sovetsky pr., Kaliningrad 236022, Russian Federation.\', \'Gerontology Research Center and Faculty of Sport and Health Sciences, University of Jyvaskyla, P.O. Box 35 (Viv 159), 40014, Jyvaskyla, Finland.\', \'I.Kant Baltic Federal University, 14B A.Nevsky str., Kaliningrad 236016, Russian Federation.\']
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