Pelargonium sidoides root extract for the treatment of acute cough due to lower respiratory tract infection in adults: a feasibility double-blind, placebo-controlled randomised tri... by Merlin Willcox, Catherine Simpson, Sam Wilding, Beth Stuart, Dia Soilemezi, Amy Whitehead, Alannah Morgan, Emma Wrixon, Shihua Zhu, Guiqing Yao, Fran Webley, Ruiyang Yan, Jennifer Bostock, Margaret Bell, Gareth Griffiths, Geraldine Leydon, Paul Little, Christopher Butler, Alastair D. Hay, Michael Moore

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