Experiment	Measurement	Reference
BaBar	\([0.55 \pm 0.13\mbox{ (stat)} \pm 0.10\mbox{ (syst)} \pm 0.02\mbox{ (corr.syst.)}] \times 10^{-4}\)	PRL 100 171803 (2008)
Average	\(\mathbf{[0.55 \pm 0.17\mbox{ (combined)}] \times 10^{-4}}\)