JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k)

Exhibit 4

JOINT FILING AGREEMENT
PURSUANT TO RULE 13d-1(k)

The undersigned acknowledge and agree that the foregoing statement on Schedule 13D, is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13D, shall be filed on behalf of each of the undersigned without the necessity of filing additional joint filing agreements.  The undersigned acknowledge that each shall be responsible for the filing of such amendments, and for the completeness and accuracy of the information concerning him or it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that he or it knows or has reason to believe that such information is inaccurate.

DATED: December 15, 2016

	/s/ Xxxxxx X. Xxxx, Xx.
	XXXX CAPITAL MANAGEMENT, LP
	By: Xxxx Fund Management, LLC, its General Partner
	By:	/s/ Xxxxxx X. Xxxx, Xx.
		Name: Xxxxxx X. Xxxx, Xx.
		Title: Chief Executive Officer
	XXXX CAPITAL PARTNERS, LP, for itself and as the
	sole member of HCP-FVE, LLC
	By: Xxxx Fund Management, LLC, its General Partner
	By:	/s/ Xxxxxx X. Xxxx, Xx.
		Name: Xxxxxx X. Xxxx, Xx.
		Title: Chief Executive Officer
	XXXX FUND MANAGEMENT, LLC
	By:	/s/ Xxxxxx X. Xxxx, Xx.
		Name: Xxxxxx X. Xxxx, Xx.
		Title: Chief Executive Officer