Hi Renee, Are you using two different fixatives for bone marrow vs lymph node? And, if yes, have the assays been validated on both fixatives? Teri Johnson, HT(ASCP)QIHC Manager, Clinical Trial Testing T +1 760 516 5954 teri.johnson at navigatebp.com Navigate BioPharma, Inc. A Novartis Subsidiary 1890 Rutherford Rd. Carlsbad, CA 92008 USA