PT - JOURNAL ARTICLE AU - Letters TI - LETTERS TO THE EDITOR DP - 1993 Mar 01 TA - PDA Journal of Pharmaceutical Science and Technology PG - 50--51 VI - 47 IP - 2 4099 - http://journal.pda.org/content/47/2/50.short 4100 - http://journal.pda.org/content/47/2/50.full SO - PDA J Pharm Sci Technol1993 Mar 01; 47