Power of Attorney

Each of the undersigned entities and individuals (collectively, the "Reporting
Persons") hereby authorizes and designates Sofinnova Management IX, L.L.C. or
such other person or entity as is designated in writing by James I. Healy (the
"Designated Filer") as the beneficial owner to prepare and file on behalf of
such Reporting Person individually, or jointly together with the other Reporting
Persons, any and all reports, notices, communications and other documents
(including, but not limited to, reports on Schedule 13D, Schedule 13G, Form 3,
Form 4 and Form 5) that such Reporting Person may be required to file with the
United States Securities and Exchange Commission pursuant to the Securities Act
of 1933, as amended (together with the implementing regulations thereto, the
"Act") and the Securities Exchange Act of 1934, as amended (together with the
implementing regulations thereto, the "Exchange Act") (collectively, the
"Reports") with respect to each Reporting Person's ownership of, or transactions
in, securities of any entity whose securities are beneficially owned (directly
or indirectly) by such Reporting Person (collectively, the "Companies").

Each Reporting Person hereby further authorizes and designates Nathalie Auber
(the "Authorized Signatory") to execute and file on behalf of such Reporting
Person the Reports and to perform any and all other acts, which in the opinion
of the Designated Filer or Authorized Signatory may be necessary or incidental
to the performance of the foregoing powers herein granted.

The authority of the Designated Filer and the Authorized Signatory under this
Document with respect to each Reporting Person shall continue until such
Reporting Person is no longer required to file any Reports with respect to the
Reporting Person's ownership of, or transactions in, the securities of the
Companies, unless earlier revoked in writing.  Each Reporting Person
acknowledges that the Designated Filer and the Authorized Signatory are not
assuming any of the Reporting Person's responsibilities to comply with the Act
or the Exchange Act.

Date: February 4, 2015

SOFINNOVA VENTURE PARTNERS IX, L.P.,
a Delaware Limited Partnership
By:	SOFINNOVA MANAGEMENT IX, L.L.C.,
	a Delaware Limited Liability Company
	Its General Partner
By:	/s/ James I. Healy
	James I. Healy
	Managing Member

SOFINNOVA MANAGEMENT IX, L.L.C.,
a Delaware Limited Liability Company
By: 	/s/ James I. Healy
	James I. Healy
	Managing Member

By:	/s/ James I. Healy
	James I. Healy
By:	/s/ Srinivas Akkaraju
	Srinivas Akkaraju
By:	/s/ Michael F. Powell
	Michael F. Powell
By:	/s/ Anand Mehra
	Anand Mehra