CUSIP No. 825704109 |
AGREEMENT
Pursuant to Rule 13d-1(k)(l) promulgated pursuant to the Securities Exchange Act of 1934, as amended, the undersigned agree that the attached Schedule 13G is being filed on behalf of each of the undersigned.
February 12, 2020 | SKYLINE VENTURE PARTNERS V, L.P. | |
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| BY: | SKYLINE VENTURE MANAGEMENT V, LLC |
| ITS: | GENERAL PARTNER |
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| By: | /s/ Kerensa Kenny as attorney-in-fact |
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| John G. Freund |
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| Managing Director |
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| SKYLINE VENTURE MANAGEMENT V, LLC | |
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| By: | /s/ Kerensa Kenny as attorney-in-fact |
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| John G. Freund |
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| Managing Member |
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| /s/ Kerensa Kenny as attorney-in-fact | |
| YASUNORI KANEKO | |
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| /s/ Kerensa Kenny as attorney-in-fact | |
| JOHN G. FREUND | |