Hi histonetters, A pathologist at our institution is looking for a reference lab that does IHC staining for Rb-1. Linda A. Sebree, HT(ASCP) University of Wisconsin Hospital & Clinics IHC/ISH Laboratory A4/204-2472 600 Highland Ave. Madison, WI 53792 (608)265-6596 FAX: (608)262-7174