title: How many unjustifiable lectures are worth $2.4 billion?
authors.affiliation: Rochester, MN. Electronic address: dunn.william@mayo.edu.
authors.forename: William F
authors.initials: WF
authors.lastname: Dunn
authors.affiliation: Rochester, MN.
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Armstrong
mesh_terms: D020811:Biomedical Technology; D002983:Clinical Competence; D004059:Diffusion of Innovation; D004502:Education, Medical, Continuing / Q000191:economics / Q000458:organization & administration*; D018961:Educational Technology; D006801:Humans; D020407:Internet