Always a witness.
Teuscher
G W
GW
D000293:Adolescent; D000294:Adolescent Behavior; D000328:Adult; D002648:Child; D002652:Child Behavior; D005260:Female; D006801:Humans; D007858:Learning; D008297:Male; D009014:Morals; D010287:Parent-Child Relations; D011369:Professional-Patient Relations