Quality control standardization of the leaves and root of Landolphia owariensis (Apocynaceae) Journal title: The Journal of Phytopharmacology Authors: Asante-Kwatia Evelyn, Mensah Abraham Yeboah, Baidoo Michael Frimpong, Asomaning George Adu Subject(s): Biological Sciences, Agricultural Science, Biomedicine, Pharmacy, Pharmacognosy