2Light RW, Mac Gregor MI, Luchsinger PC, et al. Pleural effusions: the diagnostic separation of transudates and exudates. Am.Intern Med, 1972;77:507.
3Romero S, Candela A, Martin C, et al. Evaluation of different critria for the separation of pleural transudates from exudates.Chest, 1993; 104: 399.
4Vives M, Porcel JM, Vicente de Vera M, et al. A study of Light' s critria and possible modifications for distinguishing exudative frow transudative pleural effuions. Chest, 1996;109:15O3.
5Valdes L, Pose A, Suarez J, et al. Cholesterd:a useful parameter for distinguishing between pheural exudates and transudates. Chest, 1991; 9:1907.
6Costa M, Quiroga; Cruz E. Measurement of pleural fluid cholestreol and lacte dehydrogenase: a simple and accurate set of indicators for separation of exudates from transudates.Chest, 1995;108:1260.
7Roth BJ, O' Meara TF, Cragun WH, The serum-effusion ,albumin gradient in the evaluation of pleural effusions. Chest,1990;98 :546.
8Durgess LJ, Tajaard JJF. Comparative analysis of the biochemical parameters used to distingusish between pleural transudates and exudates. Chest, 1995;107:1604.
9Meisel S, Shamiss A, Thaler M, et al. Pleural fluid to serum bilirubin concentration ratio for the separation of transudates from exudates. Chest, 1990,98:141.
10Crarcia-Pachon E, Padilla-Navas I, Sanchez JF, et al. Pleural fluid to serum choline ratio for the separation of tran and exsudtes. Chest, 1996;110:97.