Human organ donor-derived vagus nerve biopsies allow for well-preserved ultrastructure and high-resolution mapping of myelinated and unmyelinated fibers oleh Leif A. Havton, Natalia P. Biscola, Esther Stern, Plamen V. Mihaylov, Chandrashekhar A. Kubal, John M. Wo, Anita Gupta, Elizabeth Baronowsky, Matthew P. Ward, Deborah M. Jaffey, Terry L. Powley