title: Smiley's people.
authors.forename: B
authors.initials: B
authors.lastname: Henneman
authors.forename: J
authors.initials: J
authors.lastname: Hanc
authors.forename: P L
authors.initials: PL
authors.lastname: Henneman
mesh_terms: D005149:Facial Expression; D006801:Humans; D008505:Medical Staff, Hospital / Q000523:psychology*; D015337:Multicenter Studies as Topic; D011897:Random Allocation; D012904:Smiling