Acknowledgments
We thank Wenji Ning and colleagues (Shanghai Minhang District Center for Disease Control and Prevention, China) for excellent technical assistance in the measurement of chlorine levels. We also thank Johnson & Johnson Medical (China) Ltd for the technical guidance on cTnI test.
Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: None declared.
Employment or leadership: None declared.
Honorarium: None declared.
Competing interests: The funding organization(s) played no role in the study design; in the collection, analysis, and interpretation of data; in the writing of the report; or in the decision to submit the report for publication.
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