Footnotes

• JZ and XW are joint first authors.

• QZ and GT are joint senior authors.

• Twitter @sharen212, @QPCN, @garytse1

• Correction notice This article has been corrected since it published Online First. The funding statement has been added.

• Contributors JZ and XW: data analysis, data interpretation, statistical analysis, manuscript drafting and critical revision of manuscript. SL, WKKW and BC: project planning, data acquisition, data interpretation and critical revision of manuscript. QZ and GT: study conception, study supervision, project planning, data interpretation, statistical analysis, manuscript drafting and critical revision of manuscript.

• Funding This study was supported by the National Natural Science Foundation of China (NSFC) Grant Nos. 72042018, 71972164 and 71672163, in part by the Health and Medical Research Fund Grant (HMRF), the Food and Health Bureau, The Government of the Hong Kong Special Administrative Region No. 16171991 and in part by The Theme‐Based Research Scheme of the Research Grants Council of Hong Kong Grant No. T32‐102/14N.

• Competing interests None declared.

• Provenance and peer review Not commissioned; internally peer reviewed.

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