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Ruuska, Piritta S., Arto J. Hautala, Antti M. Kiviniemi, Timo. H. Mäkikallio, and Mikko P. Tulppo. Self-Rated Mental Stress and Exercise Training Response in Healthy Subjects. Frontiers Research Foundation, 2012.

Ruuska, Piritta S., et al. Self-Rated Mental Stress and Exercise Training Response in Healthy Subjects. Frontiers Research Foundation, 2012.