Experiment	Measurement	Reference
BaBar	\([6.4 \pm 9.8\mbox{ (stat)} \pm 9.6\mbox{ (syst)}] \times 10^{-6}\)	PRL 102 132001 (2009)
Average	\(\mathbf{[6.4 \pm 13.7\mbox{ (combined)}] \times 10^{-6}}\)