Experiment	Measurement	Reference
BaBar	\([5.50 \pm 0.52\mbox{ (stat)} \pm 1.04\mbox{ (syst)}] \times 10^{-3}\)	PRD 74 111102 (2006)
Average	\(\mathbf{[5.50 \pm 1.16\mbox{ (combined)}] \times 10^{-3}}\)