APSH devised the research question, co-designed the study, participated in data interpretation and writing this manuscript.
NP, SH, SA, AT, DG devised the research question.
EKW devised the research idea, conducted and analysed the computer simulations, and wrote the manuscript.
MP and LJ devised the research project and took part in its design and coordination.
EW: initiated the paper, devised the research questions, contributed to the interpretation of the findings, drafted, finalised and submitted the manuscript.
The authors declare that they have no competing interests RL devised the research question, analysed the data and drafted the manuscript.
MPM, AL, BC, RCB, and RH devised the research; MPM, AL, BC, and IS directed the experiments; TAP, SR, and AVK assisted with the experiments; and MPM and AL wrote the paper with assistance from all other authors.
APSH: I declare that I co-devised the research question, co-designed the study, participated in data interpretation and writing this report.
JMM: I declare that I co-devised the research question, co-designed the study, participated in data collection, led data analysis, interpretation and writing this report.
OG, LS, RM were jointly responsible for devising the research protocol and conceptualization of the simplified disease staging instrument.
