Hubungan antara rerata kadar seng dalam serum dengan gejala klinis gangguan pemusatan perhatian dan hiperaktivitas berdasarkan skala penilaian perilaku anak hiperaktif Indonesia (SPPAHI) = Correlation between serum zinc level and attention deficit hyperactivity disorder clinical symptoms based on skala penilaian perilaku anak hiperaktif Indonesia (SPPAHI) / Rininta Mardiani