About the Authors

Wing Man Au

Affiliation School of Public Health, The University of Hong Kong, Hong Kong

Sai Yin Ho

syho@hku.hk

Affiliation School of Public Health, The University of Hong Kong, Hong Kong

Man Ping Wang

Affiliation School of Nursing, The University of Hong Kong, Hong Kong

Wing Sze Lo

Affiliation School of Public Health, The University of Hong Kong, Hong Kong

Sze Pui Pamela Tin

Affiliation School of Public Health, The University of Hong Kong, Hong Kong

Rong Huang

Affiliation School of Public Health, The University of Hong Kong, Hong Kong

Tai Hing Lam

Affiliation School of Public Health, The University of Hong Kong, Hong Kong

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: WMA SYH MPW WSL SPPT RH THL. Performed the experiments: WMA. Analyzed the data: WMA SYH. Contributed reagents/materials/analysis tools: SYH THL. Wrote the paper: WMA SYH MPW WSL SPPT RH THL.