Truong, Phuong Thai
Saito, Shinji
Takayama, Ikuyo
Furuya, Hiroyuki
Nguyen, Binh Gia
Do, Thanh Van
Phan, Phuong Thu
Do, Cuong Duy
Dao, Co Xuan
Pham, Thach The
Dang, Tuan Quoc
Ngo, Chau Quy
Le, Ngan Thi
Bui, Vuong Minh
Le, Dung Trung
Vu, Van Thi Tuong
Pham, Thuy Thi Phuong
Arashiro, Takeshi
Kageyama, Tsutomu
Nakajima, Noriko http://orcid.org/0000-0003-1824-0603
Funding for this research was provided by:
the Agency for Medical Research and Development (AMED), Japan (JP18fk0108103, JP20fk0108082)
Ministry of Education, Culture, Sports, Science and Technology (JP20K07400)
Article History
Received: 19 June 2020
Accepted: 15 March 2021
First Online: 6 April 2021
Declarations
:
: The study was conducted in accordance with the Declaration of Helsinki and national and institutional standards. Written informed consents were obtained from all participants and their parents or legal guardians of any participant under the age of 16. The study was approved by the institutional medical ethical committees of Bach Mai Hospital, Hanoi, Vietnam, and by the National Institute of Infectious Diseases, Japan (No.621).
: Not applicable.
: The authors declare no competing interests.