Alopecia, Animals, Antigens, CD, Apoptosis, Arthritis, Autoantibodies, Binding, Competitive, Carrier Proteins, Dimerization, Longevity, Mice, Mice, Inbred C3H, Mice, Mutant Strains, Mutation, Pneumonia, Polyethylene Glycols, Receptors, Tumor Necrosis Factor, Receptors, Tumor Necrosis Factor, Type I, Recombinant Proteins, Survival Analysis, Tumor Necrosis Factor Decoy Receptors, Tumor Necrosis Factor-alpha