RT Journal Article SR Electronic T1 Viral Clearance Using Traditional, Well-Understood Unit Operations (Session I): Virus-Retentive Filtration JF PDA Journal of Pharmaceutical Science and Technology JO PDA J Pharm Sci Technol FD Parenteral Drug Association (PDA) SP 38 OP 50 DO 10.5731/pdajpst.2014.00965 VO 68 IS 1 A1 Dayue Chen YR 2014 UL http://journal.pda.org/content/68/1/38.abstract AB