Online Supplement

From 1989 to 1998, records were excluded if they contained ICD-9 codes for the following conditions: connective tissue disease or rheumatoid arthritis (ICD-9 codes 710 through 710.9, or 714 through 714.9), radiation fibrosis (ICD-9 code 508.1), asbestosis (ICD-9 code 501), coal workers’ pneumoconiosis (ICD-9 code 500), silicosis or talcosis ... ................
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