A universal reference interval for serum immunoglobulins free light chains may be outdated

Affiliations

• ¹ Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA.
• ² Rheumatology Division, Department of Medicine, University of Washington, Seattle, WA, USA.
• ³ Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT, USA.
• ⁴ Department of Biostatistics, College of American Pathologists, Northfield, IL, USA.
• ⁵ The Department of Pathology, Anatomy, and Laboratory Medicine, West Virginia University, Morgantown, WV, USA.
• ⁶ Immunopathology Laboratory, Robert Tomsich Pathology and Laboratory Medicine Institute, Cleveland Clinic, Cleveland, OH, USA.
• ⁷ Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA.