Bochtler T, Hegenbart U, Heiss C, Benner A, Cremer F, Volkmann M, Ludwig J, Perz JB, Ho AD, Goldschmidt H, Schonland SO. Evaluation of the serum-free light chain test in untreated patients with AL amyloidosis. Haematologica 2008; 93(3):459-462; https://doi.org/10.3324/haematol.11687.