Exhibit 10.53 [The Fifth Modification of Lease dated October 16, 1996 was previously filed as an exhibit to Osteotech's Annual Report on Form 10-K for the fiscal year ended December 31, 1996. The Sixth Modification of Lease dated August 11, 1998 was...Fourth Modification of Lease • April 9th, 2002 • Osteotech Inc • Services-misc health & allied services, nec
