Short- and long-term effects of tactile massage on salivary cortisol concentrations in Parkinson's disease: a randomised controlled pilot study. - Törnhage CJ; Skogar Ö; Borg A; Larsson B; Robertsson L; Andersson L; Backström P; Fall PA; Hallgren G; Bringer B; Carlsson M; Lennartsson UB; et al. (BMC complementary and alternative medicine, 2013)