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Absence of SMAD9v90m mutation in juvenile polyposis syndrome

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  • Handling editor Runjan Chetty.

  • Contributors LDCG and FHMM performed the genetic analysis. LAAB designed and supervised the study. LDCG and LAAB drafted the manuscript. FMG and GJAO critically reviewed the manuscript.

  • Competing interests None declared.

  • Ethics approval Johns Hopkins IRB.

  • Provenance and peer review Not commissioned; externally peer reviewed.