Wang, Yun
Zhang, Qiuli
Spatz, Erica S.
Gao, Yan
Eckenrode, Sheila
Johnson, Florence
Ho, Shih-Yieh
Hu, Shuang
Xing, Chao
Krumholz, Harlan M. http://orcid.org/0000-0003-2046-127X
Article History
Received: 10 September 2018
Accepted: 25 March 2019
First Online: 11 April 2019
Ethics approval and consent to participate
: <b>A</b> formal ethics approval was not required due to the retrospective nature of the study.
: Not Applicable.
: The authors declare that they have no competing interests.
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