EXHIBIT 99.1 SIGNATURES OF REPORTING PERSONS This Statement on Form 3 is filed by the Reporting Persons listed below. January 2, 2019 WARBURG PINCUS (CAYMAN) XII, L.P. By: Warburg Pincus (Cayman) XII GP LLC, its general partner By: Warburg Pincus Partners II (Cayman), L.P., its sole member By: Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner By: /s/ Steven G. Glenn ------------------------------------ Name: Steven G. Glenn Title: Authorized Signatory WARBURG PINCUS (CAYMAN) XII GP LLC By: Warburg Pincus Partners II (Cayman), L.P., its sole member By: Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner By: /s/ Steven G. Glenn ------------------------------------ Name: Steven G. Glenn Title: Authorized Signatory WARBURG PINCUS PARTNERS II (CAYMAN), L.P. By: Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner By: /s/ Steven G. Glenn ------------------------------------ Name: Steven G. Glenn Title: Authorized Signatory WARBURG PINCUS (BERMUDA) PRIVATE EQUITY GP LTD. By: /s/ Steven G. Glenn ------------------------------------ Name: Steven G. Glenn Title: Authorized Signatory WARBURG PINCUS LLC By: /s/ Steven G. Glenn ------------------------------------ Name: Steven G. Glenn Title: Authorized Signatory CHARLES R. KAYE By: /s/ Steven G. Glenn ------------------------------------ Name: Steven G. Glenn Title: Steven G. Glenn, Attorney- in-Fact* JOSEPH P. LANDY By: /s/ Steven G. Glenn ------------------------------------ Name: Steven G. Glenn Title: Steven G. Glenn, Attorney- in-Fact* *The Powers of Attorney given by each of Mr. Kaye and Mr. Landy were previously filed with the U.S. Securities and Exchange Commission on July 12, 2016 as an exhibit to a beneficial ownership report on Schedule 13D filed by Warburg Pincus LLC with respect to WEX Inc.