Development and validation of PRECISE-X model: predicting first severe exacerbation in COPD. - Sadatsafavi, M; Miravitlles, M; Quint, JK; Perugini, V; Tavakoli, H; Amegadzie, JE; Alcazar, Navarrete B; Respiratory, Effectiveness Group REG-COPD working group (Thorax, 2025)