title: Response.
authors.affiliation: Kwong Wah Hospital, Hong Kong, China. Electronic address: drhoinam@gmail.com.
authors.forename: Hoi Nam
authors.initials: HN
authors.lastname: Tse
authors.affiliation: Medical Department, Innovation and Medical Sciences, Zambon SpA, Bresso, Italy.
authors.forename: Luca
authors.initials: L
authors.lastname: Raiteri
authors.affiliation: Wong Tai Sin Hospital, Hong Kong, China.
authors.forename: King Ying
authors.initials: KY
authors.lastname: Wong
authors.affiliation: Kwong Wah Hospital, Hong Kong, China.
authors.forename: Lai Yun
authors.initials: LY
authors.lastname: Ng
authors.affiliation: Wong Tai Sin Hospital, Hong Kong, China.
authors.forename: Kwok Sang
authors.initials: KS
authors.lastname: Yee
mesh_terms: D000111:Acetylcysteine / Q000627:therapeutic use*; D000975:Antioxidants / Q000627:therapeutic use*; D044466:Asian People; D005260:Female; D006801:Humans; D008297:Male; D029424:Pulmonary Disease, Chronic Obstructive / Q000188:drug therapy* / Q000503:physiopathology*
chemical_list: D000975:Antioxidants; D000111:Acetylcysteine