1. Department of Muscle Physiology, Chair of Physiology and Biochemistry, Faculty of Rehabilitation; University School of Physical Education; Al. Jana Pawla II 78 31-571 Kraków Poland
2. Dipartimento di Scienze Mediche e Biologiche; Università degli Studi di Udine; Piazzale M. Kolbe 4 I-33100 Udine Italy