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Occupational Medicine (Philadelphia, Pa.)|September 13, 2002
Ethical issues in occupational health researchElizabeth M Ward, Joseph J Hurrell, Michael J ColliganJournal of Safety Research|March 3, 2004
The contribution of focus groups in the evaluation of hearing conservation program (HCP) effectivenessMary M Prince, Michael J Colligan, Carol Merry Stephenson, et al.Pageof 1