SECTION XXI: DISEASES OF ALLERGY AND CLINICAL IMMUNOLOGY Approach to the Patient with Allergic or Immunologic Disease STEPHEN I. WASSERMAN Primary Immunodeficiency Diseases MARK BALLOW Allergic Rhinitis and Sinusitis LARRY BORISH Urticaria and Angioedema STEPHEN C. DRESKIN Systemic Anaphylaxis, Food Allergy, and Insect Sting Allergy LAWRENCE B. SCHWARTZ Drug Allergy LESLIE C. GRAMMER Mastocytosis CEM AKIN SECTION XXII: RHEUMATIC DISEASES Approach to the Patient with Rheumatic Disease WILLIAM P. AREND AND GEORGE V. LAWRY Laboratory Testing in the Rheumatic Diseases DAVID S. PISETSKY Imaging Studies in the Rheumatic Diseases LYNNE S. STEINBACH Connective Tissue Structure and Function RICHARD F. LOESER Inherited Diseases of Connective Tissue REED E. PYERITZ The Systemic Autoinflammatory Diseases DANIEL L KASTNER Osteoarthritis NANCY E. LANE AND THOMAS J. SCHNITZER Bursitis, Tendinitis, and Other Periarticular Disorders and Sports Medicine JOSEPH J. BIUNDO Rheumatoid Arthritis JAMES R. O'DELL The Spondyloarthropathies ROBERT D. INMAN Systemic Lupus Erythematosus MARY K. CROW Systemic Sclerosis (Scleroderma) JOHN VARGA Sjogren's Syndrome STANLEY NAGUWA AND M. ERIC GERSHWIN Polymyositis and Dermatomyositis FREDERICK W. MILLER The Systemic Vasculitides JOHN H. STONE Polymyalgia Rheumatica and Temporal Arteritis ROBERT E. SPIERA AND STEPHEN A. PAGET Infections of Bursae, Joints, and Bones ERIC L. MATTESON AND DOUGLAS R. OSMON Crystal Deposition Diseases N. LAWRENCE EDWARDS Fibromyalgia and Chronic Fatigue Syndrome ROBERT M. BENNETT Systemic Diseases in Which Arthritis Is a Feature STERLING G. WEST Idiopathic Multifocal Fibrosclerosis WILMER L. SIBBITT, JR. Surgical Treatment of Joint. Disease C. RONALD MACKENZIE AND EDWIN P. SU