Patient Carole Linderman speaks to Dr. Massimo Cristofanilli before her blood is drawn for a liquid biopsy at Jefferson University Hospital in Philadelphia on Tuesday, April 28, 2015. A new type of blood test, the liquid biopsy, is starting to transform cancer treatment, sparing many patients the surgical and needle biopsies long needed to guide their care. (AP Photo/Jacqueline Larma)
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