Malmberg , Per, and Gunnar Hillerdal. “Association Between Exposure to Asbestos and Pleural Effusion. Results from a Questionnaire Study of 31000 Persons”. Upsala Journal of Medical Sciences 95, no. 1 (September 1, 1990): 45-52. Accessed April 9, 2026. https://ujms.net/index.php/ujms/article/view/6799.