Mixed-surface polyamidoamine polymer variants retain nucleic acid-scavenger ability with reduced toxicity oleh Lyra B. Olson, Nicole I. Hunter, Rachel E. Rempel, Haixiang Yu, Diane M. Spencer, Cynthia Z. Sullenger, William S. Greene, Anastasia K. Varanko, Seyed A. Eghtesadi, Ashutosh Chilkoti, David S. Pisetsky, Jeffrey I. Everitt, Bruce A. Sullenger