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Due to the extensive diversity of TCRs and the complexity of antigen-epitope-TCR interactions (where a single antigen can contain multiple epitopes, each potentially recognized by a variety of TCRs), our current results cannot directly clarify the nature of antigen specificity in CD4 and CD8 T cells within COPD airways

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Of the 113,597 doctors who participated, the brand of cigarette the doctors said they used most often most often was Camel