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America, 2004.
Hong Kong, 2004.
Hong Kong, 2004.
Australia, 1970s.
UK Practice Nurse, 2004.
Ireland, 1958.
UK, 1954.
America, 1979.
America, 1983.
Japan, 2004.
Dental Hygienists, Japan 2004.
Ireland, 1950s. From Duncan.
America, 1960s.
America, 1970s.
Hong Kong, 2004.