Author contributions
S.K. conceived and designed the study. M.C., K.H. and S.K. were involved in identifying and assessing the children and in sample collection. K.J.H. was responsible for the proteomic analyses. C.W.C., P.A.L., S.J.K., W.J.W., K.J.H., and S.K. were involved in the data analysis and interpretation. C.W.C. and S.K. drafted the manuscript. All authors were involved in revising the manuscript and approved the final submitted version.