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. 2023 Feb 7;10:1058001. doi: 10.3389/fmed.2023.1058001

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Copyright © 2023 Bai, Huang, Shi, Ge, Lu, Sun, Gu, Liang, Cheng, Tian, Xiao, Xu and Xu.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The characteristics and prognosis of patients with different SPSPII-based severities in the prospective study. (A) Symptoms. (B) PaO₂. (C) P(A-a) O₂. (D) DLCO. (E) Overall HRCT score. (F) The treatment options of patients with different severities.