| Filed | Form | Filer | Stake | Shares | Intent | |
|---|---|---|---|---|---|---|
| 2019-08-20 | SC | SMITH ROBERT J | — | — | view → | |
| 2019-03-21 | SC | HealthCor Management, L.P. | — | — | view → | |
| 2018-03-20 | SC | Hudson Executive Capital LP | — | — | view → |
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