Global Initiative for Chronic Obstructive Lung Disease 2023 Report: GOLD Executive Summary. Issue 4 (1st March 2023) - Agustí, Alvar; Celli, Bartolome R.; Criner, Gerard J.; Halpin, David; Anzueto, Antonio; Barnes, Peter; Bourbeau, Jean; Han, MeiLan K.; Martinez, Fernando J.; de Oca, Maria Montes; Mortimer, Kevin; Papi, Alberto; et al.