“…Over the years, the instrumentation, the cell types analyzed, and the assays performed have become more diverse and complex. [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11], [12],[13], [14], [15] What started out as a way to count cells has developed into a technology in which tens of thousands of cells are analyzed per second for expression of multiple proteins, viability, and function.…”