PT - JOURNAL ARTICLE AU - J. B. Schwartz TI - PDA Research DP - 1997 Sep 01 TA - PDA Journal of Pharmaceutical Science and Technology PG - 173--173 VI - 51 IP - 5 4099 - http://journal.pda.org/content/51/5/173.short 4100 - http://journal.pda.org/content/51/5/173.full SO - PDA J Pharm Sci Technol1997 Sep 01; 51