Image for mental health stubs, uses two psych images - psychiatry (medicine) and psychology.
The Star of Life, medical symbol used on some ambulances.  Star of Life was designed/created by a National Highway Traffic Safety Administration (US Gov) employee and is thus in the public domain.

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Star_of_life.svg
Psi2.svg
Star_of_life.svg: Gustavb
Psi2.svg: Gdh
derivative work: Beao