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Teppo Särkämö, Mari Tervaniemi, Sari Laitinen, Ava Numminen, Merja Kurki, Julene K.Harrison, “Effect of Music and Auditory Stimuli on Secretory Immunoglobulin a (IGA)”, Sage Journals, 1998. Matarán-Peñarrocha PhD, Carmen Moreno-Lorenzo PhD, “Effect of Music as Nursing Intervention for People Diagnosed with Fibromyalgia”, Science Direct, 2013. María Dolores Onieva-Zafra PhD, Adelaida María Castro-Sánchez PhD, Guillermo A.

Kaisers, Wolfgang Heinke, “Effects of Music Listening on Cortisol Levels and Propofol Consumption during Spinal Anesthesia”, National Center for Biotechnology Information, 2011.

Stefan Koelsch, Julian Fuermetz, Ulrich Sack, Katrin Bauer, Maximilian Hohenadel, Martin Wiegel, Udo X.

“Releasing Stress Through the Power of Music”, University of Nevada.

Soft music for relaxation and sleep