CUSIP No. 452327109 13G Page 26 of 27 PagesVenrock Associates • February 14th, 2002 • Laboratory analytical instruments
Company FiledFebruary 14th, 2002 IndustryPursuant to Rule 13d-1(k)(1) promulgated pursuant to the Securities Exchange Act of 1934, as amended, the undersigned agree that the attached Schedule 13G is being filed on behalf of each of the undersigned.