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·Ion Science Ltd·The Canadian Centre for Occupational Health & Safety ·The National Institute for Occupational Safety and Health·The Mine Safety & Health Administration·Occupational Safety & Health Administration·United States Environmental Protection Agency·European Environment Agency·China Academy Of Safety Science And Technology·Environmental Protection Department, The Government of the Hong Kong Special Administrative Region·Ministry of Environmental Protection of the People's Republic of China·Center For Diseases Control and Prevention Of Guangdong·South China National Centre of Metrology