“Modulation in Airway Smooth Muscle Reactivity and Improvement in Lung Function of Cigarette Smokers and Passive Non-Smokers Following Garcinia Kola Treatment: Http: www.doi.org 10.26538 Tjnpr V1i4.7”. Tropical Journal of Natural Product Research , vol. 1, no. 5, Nov. 2017, pp. 209-12, https://www.tjnpr.org/index.php/home/article/view/338.