?:authorAffiliation
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[\'Biostatistics Research Unit, South Africa Medical Research Council, Pretoria 0001, South Africa.\', \'Department of Statistics, University of Pretoria, Pretoria 0028, South Africa.\', \'Department of Statistics and Operations Research, University of Limpopo, Sovenga 0727, South Africa.\', \'Ingerod, SE-454 94 Brastad, Sweden.\']
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