PDCD1 and non-small cell lung carcinoma: A high proportion of the following species among microbiota increases the effectiveness of anti-PD-1 immunotherapy in NSCLC patients: Akkermansia muciniphila, Alistipes indistinctus, Bifidobacterium breve, Propionibacterium acnes, Prevotella copri, Rikenellaceae, Staphylococcus aureus, Streptocptoccus prausnitzi, Bacteroides plebeius, Enterococcus hirae and Enterobacteriaceae [Table 1].