AUTHOR CONTRIBUTIONS
L.W. and L.L. conceived the study; Q.L., Yu L, and B.Z. performed data
analysis; Jing L., S.Z., Yinglin L., and X.D. collected clinical
samples; X.W., S.G., and Juanran L performed the metagenomic sequencing
experiments; Q.L. and Jing L. drafted the manuscript.