1. Department of Pharmacy; University of Wolverhampton; MA Building, Wulfruna Street; Wolverhampton; WV1 1LY; UK
2. School of Biological Sciences; University of Nairobi Herbarium, University of Nairobi; 30197 00100; Nairobi; Kenya
3. Leicester School of Pharmacy; De Montfort University; The Gateway; Leicester; LE1 9BH; UK
4. Research Institute for Healthcare Research (RIHS); University of Wolverhampton; MA Building, Wulfruna Street; Wolverhampton; WV1 1LY; UK