Experiment	Measurement	Reference
Belle	\([2.21 \pm 0.13\mbox{ (stat)} \pm 0.10\mbox{ (syst)}] \times 10^{-6}\)	PRL 97, 162003 (2006)
BaBar	\([2.2 \pm 0.2\mbox{ (stat)} \pm 0.1\mbox{ (syst)}] \times 10^{-6}\)	PRD 72 051101 (2005)
Average	\(\mathbf{[2.21 \pm 0.13\mbox{ (combined)}] \times 10^{-6}}\)