EXHIBIT A

Item 8 – Identification and Classification of Group

Consists of 51,641,214 shares of Common Stock owned directly by HarbourVest International Private Equity Partners IV-Direct Fund L.P. HarbourVest Partners LLC (“HarbourVest”) is the Managing Member of HIPEP IV-Direct Associates LLC, which is the General Partner of HarbourVest International Private Equity Partners IV-Direct Fund L.P. Each of HarbourVest and HIPEP IV-Direct Associates LLC may be deemed to have a beneficial ownership interest in the shares held by HarbourVest International Private Equity Partners IV-Direct Fund L.P. The address of each such entity is One Financial Center, 44^th Floor, Boston, MA 02111.

Voting and investment power over the securities owned directly by HarbourVest International Private Equity Partners IV-Direct Fund L.P. is exercised by the Investment Committee of HarbourVest. Each of HarbourVest and HIPEP IV-Direct Associates LLC and the members of the HarbourVest Investment Committee disclaim beneficial ownership of the shares held directly by HarbourVest International Private Equity Partners IV-Direct Fund L.P This filing shall not be deemed an admission or affirmation that any such entity or person is a member of a group.