Experiment	Measurement	Reference
BaBar	\([3.4 \pm 1.8\mbox{ (stat)} \pm 0.3\mbox{ (syst)}] \times 10^{-4}\)	PRL 96 052002 (2006)
Average	\(\mathbf{[3.4 \pm 1.8\mbox{ (combined)}] \times 10^{-4}}\)