Effect of Panax Ginseng (G115) Capsules versus Placebo on Acute Exacerbations in Patients with Moderate to Very Severe COPD: A Randomized Controlled Trial

Effect of Panax Ginseng (G115) Capsules versus Placebo on Acute Exacerbations in Patients with Moderate to Very Severe COPD: A Randomized Controlled Trial