Impact of L-arginine and liposomal vitamin C supplementation on quality of life and daily life activities in patients with COPD: a randomized, multicenter, single blind, placebo-controlled trial (ILDA study). - Radovanovic D; Signorello JC; Fuccia G; Lazzaroni G; Danzo F; Guandalini GM; Massaro F; Tursi F; Santus P (European journal of internal medicine, 2025)