F1The securities were originally acquired from the Issuer on September 6, 2017; however, the conversion price was set upon the pricing of the Issuer's Initial Public Offering (the "IPO").
F2The amount reported represents the principal amount of the Reporting Person's Convertible Promissory Note (the "Note") only. Accrued interest of 5% per year based on the actual number of days outstanding through the conversion date will also convert.
F3The outstanding principal and accrued interest of the Note automatically converts into shares of the Issuer's Common Stock at the price per share available to the public as set forth in the final prospectus related to the IPO upon the closing of the IPO; if not so converted, the Note has a maturity date of September 6, 2018, at which time it will automatically convert into shares of the Issuer's capital stock.
F4The convertible promissory note is directly held by InterWest Partners IX, LP ("InterWest IX"). InterWest Management Partners IX, LLC ("IMP IX"), as the general partner of InterWest IX, may be deemed to beneficially own the shares held by InterWest IX. Philip Gianos, Arnold Oronsky, Gilbert Kliman, W. Stephen Holmes and Khaled Nasr are managing directors of IMP IX, and as such may be deemed to beneficially own the shares held by InterWest IX. Each of the foregoing persons disclaims beneficial ownership of such shares except to the extent of any pecuniary interest therein.