'Who was that masked man?' Elicits a different response now.
Densmore
G
G
D000163:Acquired Immunodeficiency Syndrome / Q000517:prevention & control; D006304:Health Status; D006801:Humans; D008348:Manikins; D008397:Masks; D012151:Resuscitation / Q000193:education; D012307:Risk Factors