{Reference Type}: Letter {Title}: An updated diagnostic range for serum free light chain kappa/lambda ratio using Freelite reagents on BN II or Optilite. {Author}: Li B;King R;Chan B;Rollo C;Thompson S;Florkowski C; {Journal}: Pathology {Volume}: 56 {Issue}: 5 {Year}: 2024 Aug 9 {Factor}: 5.335 {DOI}: 10.1016/j.pathol.2024.02.006