Cells, Cultured, Enzyme-Linked Immunosorbent Assay, Epithelial Cells, Epithelium, Gene Expression Regulation, Neoplastic, Humans, Interleukin-8, Mesothelioma, Neovascularization, Pathologic, Pleural Effusion, Malignant, Pleural Neoplasms, RNA, Messenger, RNA, Neoplasm