AUTHOR CONTRIBUTION
Z.J.H., and H.L. designed and initiated the project. Z.W.P., D.S.L., S.W.H., Y.L.W., H.T.S., H.L.C., and L.H.D. collected the samples. X.F.C., L.H., L.L.L., Y.X.L., Y.Q.Z., J.Y.Y. and H.R.L. performed the DNA extraction, library construction and sequencing. L.H., T.M.L., H.M.L., R.B.H., Q.W., Y.X.Z., and S.C.Y. performed the data analysis. L.H., T.M.L. and wrote the manuscript. Z.J.H., K.K., M.L., D.S.L., H.L., Q.L., H.M.Y. and X.X. supervised the manuscript. All authors read and approved the final manuscript. L.H. and T.M.L. wrote the manuscript with input from Z.J.H., K.K., M.L., D.S.L., H.L., Q.L., H.M.Y. and X.X. Z.J.H., H.L., K.K. and Q.L. supervised the project.