Ulrike Mösbauer, Francis Ayuk, Heike Schieder, Michael Lioznov, Axel R. Zander, Nicolaus Kröger. Monitoring serum free light chains in patients with multiple myeloma who achieved negative immunofixation after allogeneic stem cell transplantation. Haematologica 2007;92(2):275-276; https://doi.org/10.3324/haematol.10568.