1. Heart rate variability evaluation of Emfit sleep mattress breathing categories in NREM sleep. Issue 5 (May 2015) Authors: Tenhunen, Mirja; Hyttinen, Jari; Lipponen, Jukka A.; Virkkala, Jussi; Kuusimäki, Sonja; Tarvainen, Mika P.; Karjalainen, Pasi A.; Himanen, Sari-Leena Journal: Clinical neurophysiology Issue: Volume 126:Issue 5(2015:May) Page Start: 967 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗