| Front | Major association of large cell carcinomas in the lungs. |
| Back | Smoking. |
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| Front | PD-L1 may be present in any ___. |
| Back | non-small cell carcinoma |
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| Front | Lobar pneumonia is usually ___. Its most common causes are ___ and ___. |
| Back | bacterial; Streptococcus pneumoniae (95%); Klebsiella pneumoniae |
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