MAP20071507669 A Hematology surveillance study of pretrochemical workers exposed to 1,3 butadiene / Shan P. Tsai The purpose of this study is to evaluate hematology data from employees what had ever participated in the Shell Butadiene Medical Surveillance Program (BMSP), compared with employees who had not participated, and to examine potential hematopoietic toxicity in relation to occupational exposures at two Shell facilities En: Journal of occupational and environmental hygiene. - Cincinnati, Ohio : American Industrial Hygiene Association : American Conference of Governmental Industrial Hygienists. - Vol. 2, nº 10, October 2005 ; p. 508-515 1. Shell . 2. Higiene industrial . 3. Estudios comparativos . 4. Hematología . 5. Estudios estadísticos . 6. Refinerías . 7. Agentes contaminantes . 8. Análisis clínicos . I. Tsai, Shan P. . II. American Industrial Hygiene Association . III. American Conference of Governmental Industrial Hygienists . IV. Title.