EX-10.34 FOURTH AMENDMENT TO AGREEMENT This Fourth Amendment to Agreement ("Fourth Amendment") is made and entered into by and between MDS (Canada) Inc., MDS Nordion division ("Nordion") and IDEC Pharmaceuticals Corporation ("IDEC"), effective as of...Isotope Agreement • March 10th, 2004 • Biogen Idec Inc • Biological products, (no disgnostic substances)
