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Tropical medicine & international health, (2011).16 7 10.1111/j.1365-3156.2011.02765.x.
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International journal of epidemiology, (2011).40 2 10.1093/ije/dyq255.
2011
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Tropical medicine & international health, (2011).16 6 10.1111/j.1365-3156.2011.02778.x.
2011
Journal of health economics, (2011).31 1 10.1016/j.jhealeco.2011.10.010.
2011
International journal of gynaecology and obstetrics, (2011).114 2 10.1016/j.ijgo.2011.05.007.