Statistics from Altmetric.com
Contributors CM and JT conceived of the study and implemented it, CM and JT conducted the primary statistical analysis, CM and JT contributed to and approved the final manuscript.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Patient consent for publication Not required.
Ethics approval The study was approved by the University of Southern California Institutional Review Board (HS-18–00935).
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