1. Lung involvement in systemic sclerosis;Silver;Rheum Dis Clin N Am,1990
2. Prevention of pneumococcal disease: recommendation of the Advisory Committee on Immunization Practices (ACIP);MMWR Morb Mortal Wkly Rep,1977
3. Preventing pneumococcal disease. ACIP recommends pneumococcal polysaccharide vaccine for all adults age ≥ 65;Whitney;Geriatrics,2003
4. Preliminary criteria for the classification of systemic sclerosis (scleroderma);Arthritis Rheum,1980
5. Scleroderma (systemic sclerosis): classification, subsets, and pathogenesis;LeRoy;J Rheumatol,1988