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Pisani Ceretti A, Intra M, Borzio M, Santambrogio R, Opocher E, Ballarini C, Cordovana A, Motta R, Spina GP.Pisani Ceretti A, et al. Among authors: opocher e.Minerva Chir. 1997 Nov;52(11):1339-48.Minerva Chir. 1997.PMID: 9489332Review.Italian.
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