Pengaruh Pemberian secara Subkutan dari Kombinasi Ekstrak Akar Pasak Bumi (Eurycoma longifolia Jack) dan Artemisinin-Based Combination Therapy terhadap Parasitemia Mencit Terinfeksi Plasmodium berghei = The Effect of Subcutaneously Given Combination of Eurycoma longifolia Jack Root Extract and Artemisinin-Based Combination Therapy (ACT) on Parasitemia in Mice Infected with Plasmodium berghei