Hi All, Are there any labs running side by side slides on old lot and new lot antibodies every time you get a new lot of antibody? Please be very specific on your answers. Thanks! Debby R. Grant HT (ASCP) QIHC Histology Coordinator The Children's Mercy Hospital 2401 Gillham Road KC, Mo 64108 Lab(816)234-3827 Fax(816)802-1492