R.R.N., J.C., Y.S. and C.A.H. prepared the samples, performed the measurements and carried out data analysis.
Qian Wang: collected the samples, performed the experiments, analyzed the data, and wrote the paper.
C.L.B., S.M., V.W., E.C., B.H., N.B., C.A., K.L.T., T.D., C.H. provided the samples, performed the library preparation and sequencing.
S.E.d.G. designed the samples, performed the measurements with assistance from S.T.S., T.H.-D., R.S., V.A. and O.V.A., and analysed the data.
CBA collected the samples, performed the statistical analysis, and wrote the manuscript.
XB designed the experiment; prepared the samples; performed the data analysis; wrote the manuscript.
PMMO collected the samples, performed the PCR-RFLP and AS-PCR, analyzed the results, and wrote the manuscript.
MZ fabricated the samples, performed the AFM measurements and analysis, and participated in the discussion and modeling of the results.
CH conceived the study, fabricated the samples, performed the AFM measurements and analysis, participated in the discussion and modeling of the results, and prepared the manuscript draft.
KZ collected the samples, performed the further interpretation of results, and drafted the manuscript.
MI collected samples, performed the experiments and statistical analysis, and analyzed the data.
