Experiment	Measurement	Reference
BaBar	\([3.5 \pm 1.9\mbox{ (stat)} \pm 0.4\mbox{ (syst)}] \times 10^{-6}\)	PRD(RC) 77 111101 (2008)
Average	\(\mathbf{[3.5 \pm 1.9\mbox{ (combined)}] \times 10^{-6}}\)