by Friedman, R B, Korst, D R, Schultz, J V, Beatty, E, Entine, S
Published in Journal of medical education (01.10.1978)

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Published in JAMA : the journal of the American Medical Association (31.10.1977)

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Year of Publication 20.06.2007

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Year of Publication 11.11.2003

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Year of Publication 06.07.2007