field trials were carried out to assess the therapeutic effects including the combined use of piperaquine ( pq ) with nitroquine ( nq ) and pyronaridine ( pyr ) with nq against falciparum malaria in regions of hainan province with chloroquine-resistance in 3 successive autumns from 1985 to 1987 .
C0024535
falciparum malaria
C0008269
chloroquine