ORBIMED ADVISORS LLC
POWER OF ATTORNEY
SECTIONS 13 AND 16 REPORTING OBLIGATIONS

Know all by these presents, that the undersigned, OrbiMed Advisors LLC, hereby
constitutes and appoints Douglas Coon as its true and lawful agent and
attorney-in-fact, with full power of substitution and full power and authority
in the undersigned's name, place and stead, to:

(1)	sign any and all instruments, certificates and documents that may be
necessary, desirable or appropriate to be executed on its behalf or in its
capacity as a managing member of any partnership or limited liability company,
pursuant to Section 13 or 16 of the Securities Exchange Act of 1934, as amended;

(2)	file the same (including any amendments thereto), with all exhibits thereto,
and any other documents in connection therewith, with the Securities and
Exchange Commission, and any stock exchange or similar authority; and

(3)	take any other action of any type whatsoever in connection with the
foregoing that, in the opinion of such attorney-in-fact, may be of benefit to,
in the best interest of, or legally required of the undersigned, it being
understood that the documents executed by the attorney-in-fact on behalf of the
undersigned pursuant to this power of attorney shall be in such form and shall
contain such terms and conditions as the attorney-in-fact may approve in the
attorney-in-fact's discretion.

The undersigned hereby grants to the attorney-in-fact full power and authority
to do and perform any and every act and thing whatsoever requisite, necessary or
proper to be done in the exercise of any of the rights and powers herein
granted, as fully to all intents and purposes as the undersigned might or could
do if personally present with full power of substitution or revocation, hereby
ratifying and confirming all that such attorney-in-fact or such
attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be
done by virtue of this power of
attorney and the rights and powers herein granted.

This power of attorney shall remain in full force and effect until revoked by
the undersigned in a signed writing delivered to the foregoing attorney-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this power of attorney to be
executed as of the date written below.

Date: June 15, 2018

OrbiMed Advisors LLC

By: /s/ Jonathan T. Silverstein
Name: Jonathan T. Silverstein
Title: Member of OrbiMed Advisors LLC

By: /s/ Sven H. Borho
Name: Sven H. Borho
Title: Member of OrbiMed Advisors LLC

By: /s/ Carl L. Gordon
Name: Carl L. Gordon
Title: Member of OrbiMed Advisors LLC