Author contributions
Designed research: C.S., B.C., L.I., C.L., K.M. Conducted research: C.S., K.M., B.C. Analyzed data or performed statistical analysis: C.D.A., J.D., J.T., X.L., P.P. Wrote paper: M.P., J.D., E.G. Prepared figures: M.P., J.D., X.L. Prepared tables: M.P., J.D., P.P., J.T. Had primary responsibility for final content: M.P., J.D., L.I. M.P. and J.D. contributed equally to this paper. All authors have read and approved the final manuscript.