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• Laboratory testing practices, of United States rheumatologists, 725
• La/SSB and Ro/SSA antibodies, 927, 1625, 2238
• LE cell factor antigens, 1446
• Leishmaniasis, mimicking juvenile DM, 1139, 1140
• Leucovorin, cytotoxic treatments for refractory myositis, 392
• Leukemia, chronic myeloid (CML), in RA, 453
• Leukemic arthritis, interleukin-1β secretion in, 1695
• Leukocytes, polymorphonuclear, SLE erythrocyte-mediated immune complex inhibition by, 613
• Leukotrienes (LT), in human chondrocytes, 1645
• Lipopolysaccharides, Yersinia antigen, 855
• 5-lipoxygenase (5-LO), and chondrocyte formation, 1645
• Low back pain, prevalence in United States, 778
• Lumican, identification in synoviocytes in RA, 1356
• Lung disease, intravenous pulse cyclophosphamide for interstitial, 1215
• Lupus. See also Systemic lupus erythematosus
  • antimalarial drug-induced aquagenic type pruritus in, 744
  • neuropsychiatric, and association between serum IgG antibodies and recombinant ribosomal PO fusion protein, 745
  • neuropsychiatric, plasmapheresis in, 739
  • thalidomide and amenorrhea in, 2273
• Lupus erythematosus (LE) cells, and anti-histone H1 antibodies, 1446
• Lupus nephritis
  • after renal transplantation and cyclosporine, 678
  • 2-CdA in the treatment of SLE-associated, 335
  • FcγRIIa allele frequency in, 421
  • recurrent, after renal transplantation, 678
  • splenic B1a cells, expanded, in NZM2410 lupus-prone mice, 1652
• Lyme disease, pitfalls in diagnosis and management of, 195
• Lymphoma
  • intravascular, presenting as symmetric polyarthritis, 1127
  • T cell, osteolytic lesions in, 2275
• Lytic lesions, in phalangeal osseous sarcoidosis, 176