FFPE (Formalin-fixed paraffin embedded) tissues are standard preparations in the clinical world. It has been estimated that there are millions of FFPE samples stored in countless hospital laboratories and research pathology groups, all part of a standard operating procedure among pathologists and other hospital personnel. These tissue samples are embedded in paraffin blocks for indefinite room-temperature storage and are easily handled, and standard staining and microscopy techniques can then be employed to determine cancer stage, for example.