Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX

Conflicts of Interest and Source of Funding: The author has disclosed that there is no significant relationships with, or financial interest in, any commercial companies pertaining to this article.

Correspondence: Annikka Weissferdt, MD, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Unit 085, Houston, TX 77030 (e-mail: [email protected]).