PK Perera, Dr. M. W. S. J. Kumari , Vajira H.W. Dissanayake, A.K Thejan , S Fernando. Open label clinical trial for evaluating the effectiveness of HEALING HERBS® cough syrup.Third International Conference on Natural Products Genomics and Drug Discovery “Basic and Translational Research on Cancer and Inflammation” 10 – 11 July 2017, Conference at Galadari Hotel, Colombo, Sri Lanka