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Description
Eighty-nine patients undergoing 101 free flap reconstructions were enrolled in a prospective epidemiologic study of HNSCC (oral cavity, oropharynx, larynx, hypopharynx)
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Sample size Based on a confidence level of 0.95%, a proportion of 0.12, an accuracy of 0.03, and a sample loss of 25%, the sample size was estimated to be 604 subjects [11]
