EXHIBIT 24.1
POWER OF ATTORNEY

	Know all by these presents, that the undersigned hereby constitutes and
appoints each of Anne Leland,  Brenda Meyette, Jacquelyn Cannata, Megan Gates,
Caroline Gammill, John Condon, Nishant Dharia and Brian Shea of Mintz, Levin,
Cohn, Ferris, Glovsky and Popeo, P.C., Jennifer K. Moses and Gregory Mossinghoff
signing singly, with full power of substitution, the undersigned's true and
lawful attorney-in-fact to:

	(1)	execute for and on behalf of the undersigned, forms and authentication
documents for EDGAR Filing Access;

	(2)	do and perform any and all acts for and on behalf of the undersigned which
may be necessary or desirable to complete and execute any such forms and
authentication documents; and

	(3)	take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be of benefit to,
in the best interest of, or legally required by, the undersigned, it being
understood that the documents executed by such 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 such attorney-in-fact may approve in such
attorney-in-fact's discretion.

	The undersigned hereby grants to each such 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 the
undersigned is no longer required to file forms and execute authentication
documents with respect to the undersigned's EDGAR Filing Access, unless earlier
revoked by the undersigned in a signed writing delivered to the foregoing
attorneys-in-fact.

	IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed this   11th day of May, 2017.



/s/ Tyrell J. Rivers

By:  Tyrell J. Rivers, Ph.D.