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. 2019 Oct 29;19:188. doi: 10.1186/s12890-019-0954-z

Table 3.

WHO functional class changes after 3 months therapy

Time WHO Class P-value
I II III
Start of Study 3 (8%) 22 (61%) 11 (30%)
After 3 months 5 (14%) 18 (48%) 14 (38%) 0.539