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And this is the first time this type of stem cell treatment has been used in humans, as a phase 1 slash 2a clinical trial. And the effectiveness won't be completely known until the end of phase 3. So far, everything is very positive. The transplanted stem cells retain their retinal identity and no tumors or toxicity was seen. And researchers used six volunteers. ages were from 71 to 86 that have been diagnosed with dry age related macular degeneration and this is the most common form this is about 80% of all macular degeneration cases fall within this category. Just dropping.