Funding for this research was provided by:
LG Chem, Ltd.
Received: 10 May 2019
Accepted: 4 September 2019
First Online: 11 September 2019
Ethics approval and consent to participate
: The study was approved by the institutional review board at 3 study sites. Written informed consent was obtained from the legally authorized representatives of all the participants.
: Not applicable.
: YE and JL are employed by LG Chem, Ltd. The other authors declare that they have no competing interests.