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(1) Incorporated by reference to the exhibit so designated filed with the Company's Annual Report on Form 10-K for the year ended December 31, 2003. 

(2) Incorporated by reference to the exhibit so designated filed with the Company's Current Report on Form 8-K filed on May 27, 2005. 

(3) Incorporated by reference to the exhibit so designated filed with the Company's Registration Statement on Form S-1 (Registration No. 33-51292), originally filed on August 25, 1992. 

(4) Incorporated by reference to the exhibit so designated filed with the Company's Registration Statement on Form S-1 (Registration No. 33-59510), originally filed on March 15, 1993. 

(5) Incorporated by reference to exhibit 10.1 filed with the Company's Current Report on Form 8-K/A filed on December 1, 2006. 

(6) Incorporated by reference to the exhibit 10.1 filed with the Company’s Current Report on form 8 -K filed on July 27, 2010 

(7) Incorporated by reference to the Exhibit 10.1 filed with the Company's Current Report on form 8-K filed on February 21, 2013 

