A Firm Nodule on the Arm—Quiz Case

  • Blake M. Troiani, Michael Jude Welsch, Sarah J. Heilig, Klaus F. Helm, Loren E. Clarke
  • Archives of Dermatology, April 2011, American Medical Association (AMA)
  • DOI: 10.1001/archdermatol.2011.63-a

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The following have contributed to this page: Professor Klaus F Helm