(1) | Consists of 148,148 shares of Common Stock held directly by Frazier Life Sciences VIII, L.P., 54,655 shares of Common Stock held directly by Frazier Healthcare VI, L.P. and 1,062,058 shares of Common Stock held directly by Frazier Life Sciences Public Fund, L.P. FHM Life Sciences VIII, L.P. is the general partner of Frazier Life Sciences VIII, L.P. and FHM Life Sciences VIII, L.L.C. is the general partner of FHM Life Sciences VIII, L.P. James N. Topper and Patrick J. Heron are the sole members of FHM Life Sciences VIII, L.L.C. and therefore share voting and investment power over the shares held by Frazier Life Sciences VIII, L.P. FHM VI, L.P. is the general partner of Frazier Healthcare VI, L.P. and FHM VI, L.L.C. is the general partner of FHM VI, L.P. James N. Topper, Patrick J. Heron, Alan Frazier, Nader Naini and Nathan Every are the members of FHM VI, L.L.C. and therefore share voting and investment power over the shares held by Frazier Healthcare VI, L.P. FHMLSP, L.P. is the general partner of Frazier Life Sciences Public Fund, L.P. and FHMLSP, L.L.C. is the general partner of FHMLSP, L.P. James N. Topper, Patrick J. Heron, Albert Cha and Jaimie Brush are the members of FHMLSP, L.L.C. and therefore share voting and investment power over the shares held by Frazier Life Sciences Public Fund, L.P. |