Should systematic reviews include non-randomized and uncontrolled studies? The case of acupuncture for chronic headache (Q34487154)

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Should systematic reviews include non-randomized and uncontrolled studies? The case of acupuncture for chronic headache
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    Should systematic reviews include non-randomized and uncontrolled studies? The case of acupuncture for chronic headache (English)
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    Michael Scholz
    Dieter Melchart
    Stefan N Willich
    1 January 2002

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