EXHIBIT A
Joint Filing Statement
We, the undersigned, hereby express our agreement that the attached Schedule 13D/A is filed on behalf of each of us.
Dated: February 19, 2019 | ||||||
THE COLUMN GROUP, LP | THE COLUMN GROUP GP, LP | |||||
By: | The Column Group GP, LP |
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By: | /s/ Peter Svennilson | By: | /s/ Peter Svennilson | |||
Name: | Peter Svennilson | Name: | Peter Svennilson | |||
Title: | Managing Partner | Title: | Managing Partner | |||
THE COLUMN GROUP II, LP | THE COLUMN GROUP II GP, LP | |||||
By: | The Column Group II GP, LP |
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By: | /s/ Peter Svennilson | By: | /s/ Peter Svennilson | |||
Name: | Peter Svennilson | Name: | Peter Svennilson | |||
Title: | Managing Partner | Title: | Managing Partner | |||
PONOI CAPITAL, LP | PONOI MANAGEMENT, LLC | |||||
By: | Ponoi Management, LLC |
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By: | /s/ Peter Svennilson | By: | /s/ Peter Svennilson | |||
Name: | Peter Svennilson | Name: | Peter Svennilson | |||
Title: | Managing Partner | Title: | Managing Partner | |||
By: | /s/ Peter Svennilson |
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Peter Svennilson | ||||||
By: | /s/ David V. Goeddel |
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David V. Goeddel | ||||||
By: | /s/ Tim Kutzkey |
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Tim Kutzkey |