JP has contributed in the laboratory testing and field data acquisition, has performed stability analyses presented in the paper and has been involved in results interpretation.
SDJ has made the paper's concept, giving the introduction part and presenting the research problem and methodology, she has contributed in the laboratory work, field data acquisition and interpretation of the results, as well as making the final conclusions and general supervision.
IMC supervised and also contributed in the laboratory work, participated in the design of the study and helped to draft the manuscript.
WA contributed in sample collection, laboratory tests, data acquisition, statistical analysis and drafting of the manuscript.
The pre-publication history for this paper can be accessed here: http://www.biomedcentral.com/1471-2369/12/45/prepub Thai-SEEK group: Members of Thai-SEEK group below had contributed in data collection, performing laboratory tests, or general management at the camp sites.
HAS, designed the laboratory procedures, and contributed in drafting the paper.
AE, PF and KM contributed in collection of samples and the laboratory work as well as handling horses.
SP, was the major expert in laboratory analysis of biomarkers in alternative matrices and contributed in writing the manuscript.
EP, was an important laboratory technician in biomarkers analyses and contributed in writing the manuscript.
LM, was the main laboratory technician in biomarkers analyses, and contributed in writing the manuscript.
