Nguyen 

Viet Nhung

National Lung Hospital/

Viet Nam

Nguyen

Van Hung

National Lung Hospital/

Viet Nam

Dinh Thi

Hieu

National Lung Hospital/

Viet Nam

Ngo Anh

The

Viet Tiep Hospital,

Hai Phong/Viet Nam

Nguyen

Thi Hieu

Viet Tiep Hospital,

Hai Phong/Viet Nam

Pham Van 

Quang

Hai Phong Lung Hospital/

Vietnam

Pham Thi 

Thu Trang

Hai Phong University

of Medicine/Viet Nam