Experiment	Measurement	Reference
BaBar	\([2.0 \pm 0.7\mbox{ (stat)} \pm 0.2\mbox{ (syst)}] \times 10^{-5}\)	PRD 73 011101 (2006)
Average	\(\mathbf{[2.0 \pm 0.7\mbox{ (combined)}] \times 10^{-5}}\)