MAGEL2 and Anxiety: We previously found that the Prader-Willi syndrome imprinted gene, Magel2, significantly affects foraging modules (Hörndli et al., 2019), building on studies by others showing that Magel2 affects anxiety-like responses, feeding, activity, and 5-HT signaling (Kozlov et al., 2007; Mercer et al., 2009).