MUC1 and pneumocystosis: Additional tests, such as serum (1–3)-beta-D-glucan (BG) and lactate dehydrogenase (LDH) and Krebs von den Lungen-6 antigen (KL-6) tests, that have been previously shown to aid the diagnosis of PCP were not be performed in our study (Nakamura et al., 2009; Damiani et al., 2013; Esteves et al., 2015).