Parent Directory| Name | Size | Last Modified |
|---|---|---|
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| 0001564590-17-023003-index.html | 2017-11-09 08:10:15 | |
| 0001564590-17-023003.txt | 2017-11-09 08:10:15 | |
| atra-8k_20171109.htm | 31980 | 2017-11-09 08:10:15 |
| atra-ex991_28.htm | 155816 | 2017-11-09 08:10:15 |