Scanning electron micrographs of porcine inner ear in vitro culture cells showing the existence of hair-cell like cells at passage 4 using Hitachi S4700 SEM. Image courtesy of Dr. Printha Wijesinghe in Dr. Desmond Nunez lab (Division of Otolaryngology, Department of Surgery, Faculty of Medicine, UBC). These cell cultures were grown on poly-L-lysine coated cover glasses containing DMEM medium plus 10% FBS and incubated at 37^oC, 5% CO₂.