Yamaguchi University, affiliation not provided to SSRN, Technical University of Kenya, Yamaguchi University, Yamaguchi University, Yamaguchi University, Yamaguchi University, Yamaguchi University, University of Nairobi - Department of Public Health, Pharmacology and Toxicology, University of Nairobi, Nagasaki University, Yamaguchi University, Yamaguchi University, Nagasaki University and Yamaguchi University