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Authors
Feng, Zuliang http://orcid.org/0000-0001-5196-9469
Feng, Michael P.
Feng, David P.
Solórzano, Carmen C.
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Article History
Received: 31 March 2019
Accepted: 2 July 2019
First Online: 4 July 2019
Compliance with ethical standards
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: Zuliang Feng, Michael P Feng, David P Feng, and Carmen C. Solórzano declare that they have no conflict of interest.
: All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2000 (5). Informed consent was obtained from all patients for being included in the study.
