A Portable Live-Cell Imaging System With an Invert-Upright-Convertible Architecture and a Mini-Bioreactor for Long-Term Simultaneous Cell Imaging, Chemical Sensing, and Electrophysiological Recording. - Dhanesh Kattipparambil Rajan; Joose Kreutzer; Hannu Valimaki; Mari Pekkanen-Mattila; Antti Ahola; Anne Skogberg; Katriina Aalto-Setälä; Heimo Ihalainen; Pasi Kallio; Jukka Lekkala (IEEE Access, 2018)