Same abundance ratio trends as in Fig. 5 but with the addition of the trends derived from the M giants in the fields located at (l, b) = (0°, − 1°) of Rich et al. (2007) denoted by green asterisks, and at (0°, − 1.75°) and (1°, − 2.65°) of Rich et al. (2012), denoted by green pluses and crosses, respectively. Furthermore, the mean abundance ratios of the two populations of Terzan 5 at (l,b) = (3.8°,+ 1.7°) from Origlia et al. (2011) are shown with green squares. For the inner globular cluster Liller 1 at (l,b) = (354.8°, − 0.2°), Origlia et al. (2002) find [Fe/H] ~ − 0.3 and [α/Fe] ~ + 0.3], which fits nicely with the general trend of the Rich et al. (2007, 2012) field stars.