Impaired Ventilatory Efficiency Identifies High-Risk Mild-to-Moderate Chronic Obstructive Pulmonary Disease Zhishan Deng; Fan Wu; Qi Wan; Cuiqiong Dai; Lifei Lu; Zihui Wang; Kunning Zhou; Xiaohui Wu; Gaoying Tang; Huajing Yang; Jieqi Peng; Suyin Huang; Guannan Cai; Fangyan Wu; Junfeng Lin; Xiaoyu Wang; Changli Yang; Yongqing Huang; Rongchang Chen; Nanshan Zhong; Yumin Zhou; Pixin Ran;

Association between occupational exposure and chronic obstructive pulmonary disease and respiratory symptoms in the Spanish population Eduardo Loeb; Jan-Paul Zock; Marc Miravitlles; Esther Rodríguez; Juan José Soler-Cataluña; Joan B. Soriano; Francisco García-Río; Pilar de Lucas; Inmaculada Alfageme; Ciro Casanova; José Miguel Rodríguez González-Moro; Julio Ancochea; Borja G. Cosío; Jaume Ferrer Sancho;

Short and Long-Term Impact of COVID-19 Infection on Previous Respiratory Diseases Eusebi Chiner-Vives; Rosa Cordovilla-Pérez; David de la Rosa-Carrillo; Marta García-Clemente; José Luis Izquierdo-Alonso; Remedios Otero-Candelera; Luis Pérez-de Llano; Jacobo Sellares-Torres; José Ignacio de Granda-Orive;