Gao K, Li M, Zhong L, Su Q, Li J, Li S, He R, Zhang Y, Hendricks G, Wang J, Gao G. Empty Virions In AAV8 Vector Preparations Reduce Transduction Efficiency And May Cause Total Viral Particle Dose-Limiting Side-Effects. Mol Ther Methods Clin Dev. 2014; 1(9):20139.