title: Authors' response to "Difficult to wean patients".
authors.affiliation: Chest Department, Faculty of Medicine, Assiut University Hospital, Egypt. Electronic address: shereen_hssn@yahoo.com.
authors.forename: Shereen
authors.initials: S
authors.lastname: Farghaly
authors.affiliation: Anesthesiology Department, South Egypt cancer Institute, Assiut University Hospital, Egypt. Electronic address: dr_mostafagalal@yahoo.com.
authors.forename: Mostafa
authors.initials: M
authors.lastname: Galal
authors.affiliation: Chest Department, Faculty of Medicine, Assiut University Hospital, Egypt. Electronic address: aabdelazeem@yahoo.com.
authors.forename: Ali A
authors.initials: AA
authors.lastname: Hasan
authors.affiliation: Clinical Pathology Department, Faculty of Medicine, Assiut University Hospital, Egypt. Electronic address: asmaa_nafadyhn@yahoo.com.
authors.forename: Asmaa
authors.initials: A
authors.lastname: Nafady