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In a message dated 97-04-18 03:09:19 EDT, you write:
<< They were trying to develop methods of using human liver cells, rather
than animal
tests, >>
Actually, biologists have been using tissues experimentally for a good many
years to replace animal testing, and many of them have indeed been used
rourinely for years.
However, it is not (yet) a panacea because the problems studied are most
complex...
MM