. 2017 Dec 15;19(12):e400. doi: 10.2196/jmir.7677
©Domingo Orozco-Beltran, Manuel Sánchez-Molla, Julio Jesus Sanchez, José Joaquin Mira, Domingo ValCrònic Research Group. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 15.12.2017.
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Figure 3.
Study flowchart. COPD: chronic obstructive pulmonary disease.