Comparison between the stellar parameters obtained by Repolust et al. (2005) and our work, both from the NIR alone. Upper left panel: effective temperature. The dashed lines represent ± 1000 K; upper right panel: logarithmic gravity (uncorrected, ±0.1 dex). Star number 9 has been slightly shifted in both axes for clarity; lower left panel: log Q (±0.2 dex); lower right panel: Y_He(±0.03), and stars #7, 9, 10, and 11 have been slightly shifted upward from its value in Repolust et al. (2005, Y_He= 0.20) to avoid overlap, as well as star #4 (Y_He= 0.15). Numbers indicate the stars as listed in Table 1.