Median abundances (open dots) of lithium, carbon, nitrogen, oxygen, sodium, and magnesium for the different populations identified in our sample of GCs with at least four stars with both photometric tagging and spectroscopic abundances. The open squares highlight APOGEE measurements. The vertical bands represent the interquartile range, and are color coded following the prescriptions introduced in Figure 1. Median values from the same spectroscopic dataset are connected by gray lines.