Pertseva, T. O., and D. S. Mihailichenko. “Questionnaires Usage in the Risks of Exacerbation Determination and Quality of Life Evaluation in COPD Patients”. Zaporozhye Medical Journal 17, no. 6 (December 29, 2015). Accessed November 23, 2024. http://zmj.zsmu.edu.ua/article/view/57135.