NGF and mastitis: The concentration of BDNF and cumulative NF (BDNF + NGF) in human milk were 5.0- (p = 0.018, Figure 3A) and 3.2-fold (p = 0.036, Figure 3C) higher, respectively, in mothers without mastitis than in mothers with previous mastitis, but NGF alone did not differ (Figure 3B).