Dr. Won Jin Cho, Ph. D. received his Ph.D. degree in the field of molecular biology from Busan National University in South Korea. He has more than 30-years of research experience (20 years in the US) in cell and molecular biology, has guided and trained graduate and undergraduate students, and has published extensively. Dr. Cho is also an expert in the use of various imaging modalities, especially Atomic Force Microscopy, fluorescence and expansion microscopy. Dr. Cho has worked extensively on the porosome complex and is a co-discoverer of the porosome in hair cells of the inner ear.