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I. O. Orubuloye, Pat Caldwell, John C. Caldwell, The Role of High-Risk Occupations in the Spread of AIDS: Truck Drivers and Itinerant Market Women in Nigeria, International Family Planning Perspectives, Vol. 19, No. 2 (Jun., 1993), pp. 43-48+71
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Orubuloye et al. (1993) studied this question.
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