Exhibit 99.1
Joint Filers’ Signatures
ESSETIFIN S.P.A.
| By: | /s/ Marino Zigrossi | |
| Name: | Marino Zigrossi | |
| Title: | Director | |
| Date: | October 2, 2017 |
Enrico Cavazza
| By: | /s/ Marino Zigrossi | |
| Name: | Marino Zigrossi | |
| Title: | Attorney-in-Fact | |
| Date: | October 2, 2017 |
Silvia Cavazza
| By: | /s/ Marino Zigrossi | |
| Name: | Marino Zigrossi | |
| Title: | Attorney-in-Fact | |
| Date: | October 2, 2017 |
Francesca Cavazza
| By: | /s/ Marino Zigrossi | |
| Name: | Marino Zigrossi | |
| Title: | Attorney-in-Fact | |
| Date: | October 2, 2017 |
Martina Cavazza Preta
| By: | /s/ Marino Zigrossi | |
| Name: | Marino Zigrossi | |
| Title: | Attorney-in-Fact | |
| Date: | October 2, 2017 |
Paolo Cavazza
| By: | /s/ Fabio Poma | |
| Name: | Fabio Poma | |
| Title: | Attorney-in-Fact | |
| Date: | October 2, 2017 |