title: Authors' reply.
authors.affiliation: Department of Pneumonology, Medical School, Democritus University of Thrace, Alexandroupolis, Greece.
authors.forename: Stavros
authors.initials: S
authors.lastname: Anevlavis
authors.forename: Marios E
authors.initials: ME
authors.lastname: Froudarakis
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D016066:Pleural Effusion, Malignant / Q000175:diagnosis*