Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

___________________________________

*  The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

1	Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only)   Cormorant Private Healthcare Fund I, LP
2	Check the Appropriate Box if a Member of a Group (See Instructions)
	(a)            [ ]
	(b)            [x]
3	SEC Use Only
4	Citizenship or Place of Organization.   Delaware
Number of Shares Beneficially Owned by Each Reporting Person With		5  Sole Voting Power   0 shares
		6  Shared Voting Power   1,819,592 shares   Refer to Item 4 below.
		7  Sole Dispositive Power   0 shares
		8  Shared Dispositive Power   1,819,592 shares   Refer to Item 4 below.
9	Aggregate Amount Beneficially Owned by Each Reporting Person   1,819,592 shares   Refer to Item 4 below.
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)     [ ] N/A
11	Percent of Class Represented by Amount in Row (9)*   3.24%   Refer to Item 4 below.
12	Type of Reporting Person (See Instructions)   PN (Partnership)

Item 1.

Item 2.

Item 3.

If this statement is filed pursuant to §§240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:

Item 4.

Ownership***

Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.

*** Shares reported herein for Cormorant Asset Management, LP represent shares which are beneficially owned by Cormorant Global Healthcare Master Fund, LP (the “Master Fund”) and Cormorant Private Healthcare Fund I, LP (Fund I”), as reported herein, and a managed account (the “Account”).  Cormorant Global Healthcare GP, LLC and Cormorant Private Healthcare GP, LLC serve as the general partners of the Master Fund and Fund I, respectively. Cormorant Asset Management, LP serves as the investment manager to the Master Fund, Fund I and the Account.  Bihua Chen serves as the managing member of Cormorant Global Healthcare GP, LLC, Cormorant Private Healthcare GP, LLC and the general partner of Cormorant Asset Management, LP.  Each of the Reporting Persons disclaims beneficial ownership of the shares reported herein except to the extent of its or his pecuniary interest therein. Percentage calculations herein are based upon the statement in the Issuer's Quarterly Report for the quarter ended September 30, 2018, as filed with the Securities and Exchange Commission on November 8, 2018, that there were 56,242,571 shares of Common Stock outstanding as of November 5, 2018.

Item 5.                   Ownership of Five Percent or Less of a Class

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following [ ].

Item 6.                 Ownership of More than Five Percent on Behalf of Another Person

Not applicable.

Item 7.                  Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company

Not applicable.

Item 8.

Identification and Classification of Members of the Group

Not applicable.

Item 9.

Notice of Dissolution of Group

Not applicable.

Item 10.

Certification

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this Statement is true, complete and correct.

February 14, 2019

	CORMORANT GLOBAL HEALTHCARE MASTER FUND, LP
	By: Cormorant Global Healthcare GP, LLC
	its General Partner
	By: /s/ Bihua Chen
	Bihua Chen, Managing Member
	CORMORANT GLOBAL HEALTHCARE GP, LLC
	By: /s/ Bihua Chen
	Bihua Chen, Managing Member
	CORMORANT PRIVATE HEALTHCARE FUND I, LP
	By: Cormorant Global Healthcare GP, LLC
	its General Partner
	By: /s/ Bihua Chen
	Bihua Chen, Managing Member
	CORMORANT PRIVATE HEALTHCARE GP, LLC
	By: /s/ Bihua Chen
	Bihua Chen, Managing Member
	CORMORANT ASSET MANAGEMENT, LP
	By: Cormorant Asset Management GP, LLC
	its General Partner
	By: /s/ Bihua Chen
	Bihua Chen, Managing Member
	/s/ Bihua Chen
	Bihua Chen