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Figure 5 :(a) H and E, ×100 and (b) Elastic van Gieson, ×100 show pulmonary arterial involvement, while (c) H and E, ×400 and (d) Elastic van Gieson, ×100 show pulmonary venular involvement

Figure 5 :(a) H and E, ×100 and (b) Elastic van Gieson, ×100 show pulmonary arterial involvement, while (c) H and E, ×400 and (d) Elastic van Gieson, ×100 show pulmonary venular involvement