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1by Elmarie van der Westhuizen, Johanita R. Burger, Martie S. Lubbe, Jan H.P. SerfonteinSubjects: “...Statistical Analysis System® program...”
Published 2010-11-01
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2by Johanita R. Burger, Elmarie van der Westhuizen, Martie S. Lubbe, Jan H. P. Serfontein“... aged 19 years and younger from a South African pharmaceutical benefit management company’s database...”
Published 2009-07-01
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