Naidu, P.S.R, Denham, E. Bartlett, C.A., McGonigle, T., Taylor, N.L., Norret, M., Smith, N.M., Dunlop, S.A., *Swaminathan Iyer, K. and * Fitzgerald, M Serum Interactions Moderate the Release Kinetics of Ion Channel Antagonists from Transferrin-Functionalized Polymeric Nanoparticles Designed for Systemic Delivery to the Central Nervous System. Accepted for publication RSC Advances