The development of the U.S. EPA health effects research laboratory frozen blood cell repository program.

We have suggested that proper blood-cell freezing and storage is necessary in longitudinal studies with reduced between tests error, for specimen sharing between laboratories and for convenient scheduling of assays. Our present purpose is to describe the design and use of a prototype computer program, Cryovial, for data-based management of frozen cell repositories. We are pleased to provide, free of charge upon request, a 5.25" (specify 0.36 or 1.2 MB) disk containing all files required to run Cryovial.