Author contribution
SL and GK conceived and designed the experiments. SL, IW, JM and GS
recruited volunteers and processed samples. MR performed the skin prick
test and venepuncture. JM, IW and SL performed the experiments. JM, SL,
and IW analysed the data. SL, GK, and RM contributed the
reagents/materials/analysis tools. JM, IW, and SL wrote the paper. All
authors evaluated and approved the manuscript.