L Liotta, M Ferrari, and E Petricoin (2003)
Clinical proteomics: Written in blood
Nature 425:905.
The blood contains a treasure trove of previously unstudied biomarkers that could reflect the ongoing physiologic state of all tissues. Every cell in the body leaves a record of its physiological state in the products it sheds to the blood, either as waste or as signals to neighbouring cells. What some may view as a cellular refuse is really a diagnostic gold mine.

