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  1. Z Teng
  1. Zi Teng, Hong Kong Post Office Headquarters, PO Box 7450, Hong Kong; ziteng{at}hkstar.com

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  • See linked editorial on page 1 and linked article on page 34

  • Competing interests: None.

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Footnotes

  • See linked editorial on page 1 and linked article on page 34

  • Competing interests: None.

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