Experiment	Measurement	Reference
BaBar	\([-1.3 \pm 3.1\mbox{ (stat)} \pm 0.3\mbox{ (syst)}] \times 10^{-6}\)	PRL 102 132001 (2009)
Average	\(\mathbf{[-1.3 \pm 3.1\mbox{ (combined)}] \times 10^{-6}}\)