1. School of Optometry The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong 2Squina Centre for Infection Control, School of Nursing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
2. School of Optometry The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
3. Squina Centre for Infection Control, School of Nursing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong