We wish to thank Bethany Edwards for help with data collection and supporting the writing of the methods with helpful information and comments.
She also assisted in the writing of the methods section.
JT conducted the bioinformatics analysis and contributed to the writing of the methods for 454 sequencing and the manuscript.
JC derived the model, computed the real data, run simulation studies, and participated in the writing of the Methods section.
MZ carried out the SSF experiments, assisted with EH experiment preparation, and contributed to the writing of the Methods.
CJB, CLK, MW, and ACH performed data generation and analysis and helped with the writing of the methods.
MK was responsible for analysis of the evaluation data and contributed to the writing of the methods, results and discussion sections.
XY participated in the discussion and implementation of the methods and the writing of manuscript.
SLB carried out the statistical analysis and writing of the methods and results.
The written methods of assessment include multiple choice questions (MCQs), true-false questions, short answer questions, essays and modified essay questions.
