Relationship of Psychological and Physiological Variables in Long-Term Self-Monitored Data During Work Ability Rehabilitation Program. - Juha Pärkkä; Juho Merilahti; Elina M. Mattila; Esko Malm; Kari Antila; Martti T. Tuomisto; Ari Viljam Saarinen; Mark J. van Gils; Ilkka Korhonen (IEEE Trans. Inf. Technol. Biomed., 2009)