title: Space medicine: answering the challenge.
authors.affiliation: NASA/Johnson Space Center, Houston, Texas 77058.
authors.forename: C W
authors.initials: CW
authors.lastname: Lloyd
mesh_terms: D000337:Aerospace Medicine / Q000639:trends*; D005569:Formularies as Topic; D006801:Humans; D010604:Pharmacy / Q000639:trends*; D013026:Space Flight