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Digostics
December 2, 1995
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Needlebay
November 7, 1994
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OptiGene Diagnostics
May 7, 1993
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Greenbrook Healthcare
February 2, 1993
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Active Silver
December 15, 1992
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Omega Diagnostics
January 17, 1992
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Hilton Nursing Partners
January 13, 1991
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ISRV
November 5, 1976
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Spark
November 4, 1967