Complex sentence: Dr. Alfredo Quinones-Hinojosa is the Associate Professor of Neurosurgery, Neuroscience, Oncology and Cellular and Molecular Medicine, and the Director of the Brain Tumor Stem Cell Laboratory at Johns Hopkins University.
Split into simpler sentences: Dr. Alfredo Quinones-Hinojosa is the Associate Professor of Neurosurgery, Neuroscience, Oncology and Cellular and Molecular Medicine. He is also the Director of the Brain Tumor Stem Cell Laboratory at Johns Hopkins University.