References

1. Light RW: Pleural Disease, 2nd edition. Philadelphia, Lea and Febiger, 1990.
2. Light, RW et al: Parapneumonic effusions. Am J Med 69:985- 986, 1980.
3. Sahn SA: State of the art: The pleura. Am Rev Respir Dis 138:184-234, 1988.
4. Sahn, SA, Good, JT Jr: Pleural fluid pH in malignant effusions. Ann Intern Med 108:345-349, 1988.