Upon providing informed consent, subjects will be sequentially enrolled into the study. Decision regarding dose escalation will be based on the recommendation from the Data Monitoring Committee (DMC). The first 3 eligible subjects will receive the low dose of AXT107 injection. After the 3 low dose subjects complete a 7-day follow-up, the DMC will review their safety data. If an acceptable safety profile is determined by the DMC, 3 additional subjects will be enrolled to receive the mid dose of AXT107 injection. Upon completion of a 7-day follow-up, review of the safety data, and determination of an acceptable safety profile by the DMC for the mid dose subjects, 3 additional subjects will be enrolled to receive the high dose of AXT107 injection.