1. The prevalence of low back pain in Africa: a systematic review;Louw;BMC Muscoskel Disord,2007
2. National Policy on Traditional Medicine and Regulation of Herbal Medicines: Report of a WHO Global Survey,2005
3. Screening plants for new medicines;Farnsworth;Biodiversity,1988
4. Phytochemical and in vitro antimicrobial assay of the leaf extract of Newbouldia laeves;Usman;Afr J Tradit, Complementary Altern Med,2008
5. International association for the study of pain,2016