Comparison of the abundance of sodium in a sample of RGB stars studied in the framework of the ESO Large Program First Stars and in the three low-[Sr/Ba] giants studied here. The symbols are the same as in Fig. 3. The three low-Sr/Ba giants have a high sodium abundance like several RGB mixed stars, but [Na/Fe] in these stars is less than the value observed in the majority of the CEMP-s or CEMP-no stars.
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