1) our new antidepressant drugs induce branching of neurones (innovation). Therefore, I suggest to transform the prolongation from the neuron to the external circle (i.e. the hope) into new neuronal branches. Also, the the proteins target of our drugs are "dimeric" which means formed by two unified sub-units... what about "doubling" each of the 4 white circles?
2) as I proposed to APE (#1), I would also like to see a version with a stylized brain (mental health) instead of a neuron.