Security	Date	Code	Shares	Price	A/D	Owned after	D/I
Common Stock^F1,F2	Oct 16, 2017	C	1,538,461	—	A	1,538,461	D
Common Stock^F1,F2	Oct 16, 2017	C	1,647,297	—	A	3,185,758	D
Common Stock^F2	Oct 16, 2017	C	170,028	$7.00	A	3,355,786	D

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	D/I
Series B Preferred Stock^F1,F2,F3	—	Oct 16, 2017	C	1,538,461	D	—	—	Common Stock	1,538,461	D
Series C Preferred Stock^F1,F2,F3	—	Oct 16, 2017	C	1,647,297	D	—	—	Common Stock	1,647,297	D
Convertible Promissory Note^F4,F2	$7.00	Oct 16, 2017	C	—	D	—	—	Common Stock	170,028	D

Explanation of responses

F1The shares of the Issuer's Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, on a 1:1 basis immediately prior to the consummation of the Issuer's Initial Public Offering (the "IPO").
F2The shares are 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.
F3The expiration date is not relevant to the conversion of these securities.
F4The amount reported in column 5 is the principal amount of Reporting Person's Convertible Promissory Note (the "Note"). The outstanding principal and accrued interest of the Note automatically converted 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 Issuer's IPO upon the closing of the IPO.