Choi, Sung W. http://orcid.org/0000-0001-9990-762X
Ramos, Christal
Kim, Kyungha
Azim, Shahinshah Faisal
Article History
Received: 1 December 2018
Revised: 21 February 2019
Accepted: 12 March 2019
First Online: 15 April 2019
Compliance with Ethical Standards
:
: Sung W. Choi, Christal Ramos, Kyungha Kim, and Shahinshah Faisal Azim declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Although retrospective studies are conducted on already available data or biological material (for which formal consent may not be needed or is difficult to obtain), ethical approval may be required dependent on the law and the national ethical guidelines of a country. Authors should check with their institution to make sure they are complying with the specific requirements of their country.