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Russell E. Madsen is the former senior vice-president of science and technology at PDA, and is a current member of Pharmaceutical Technology's editorial advisory board.
T.H. Meltzer is a consultant, Capitola Consulting Co. (Bethesda, MD), tel. 301.986.8640, fax 301.986.9085.
James P. Agalloco is the president of Agalloco & Associates, P.O. Box 899, Belle Mead, NJ 08502, tel. 908.874.7558, firstname.lastname@example.org. He is also a member of Pharmaceutical Technology’s editorial advisory board.
In the concluding part of this article, the authors address diffusive-airflow imprecisions and measurements as well as automated integrity-test equipment, variations in bubble-point measurements, and the identification of a "sterilizing" filter.