| 摘要 |
The invention relates to the use of macrobeads which have been kept in in vitro storage for long term culture, i.e., for at least about 8 months. The macrobeads surprisingly exhibit continued efficacy in producing therapeutically useful materials. The fact that the macrobeads can be used after long term culture allows the artisan to screen the products so as to make sure that, in addition to being therapeutically useful, they remain safe as implants.
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