The effect of a herbal formulation on the incidence and severity of upper respiratory symptoms in healthy volunteers. an open-label, randomised controlled clinical trial

Goonaratna, C.Sooriyarachchi, M.R.2016-01-142016-01-142012The Ceylon Medical Journal, 57(1)pp.19-32https://dl.nsf.gov.lk/handle/1/20892Medical SciencesThe effect of a herbal formulation on the incidence and severity of upper respiratory symptoms in healthy volunteers. an open-label, randomised controlled clinical trialArticle