Exhibit A to Schedule 13D AGREEMENT TO FILE JOINTLY We, the undersigned, hereby express our agreement that the attached Schedule 13D, as well as each subsequent amendment, is filed on behalf of each of us.Agreement to File Jointly • October 9th, 1996 • Hoechst Corp • Pharmaceutical preparations
Contract Type FiledOctober 9th, 1996 Company IndustryWe, the undersigned, hereby express our agreement that the attached Schedule 13D, as well as each subsequent amendment, is filed on behalf of each of us.