The impact of gravidity, symptomatology and timing of infection on placental malaria oleh Erin E. Tran, Morgan L. Cheeks, Abel Kakuru, Mary K. Muhindo, Paul Natureeba, Miriam Nakalembe, John Ategeka, Patience Nayebare, Moses Kamya, Diane Havlir, Margaret E. Feeney, Grant Dorsey, Stephanie L. Gaw