We gratefully acknowledge support of the Young Academy of the Royal Netherlands Academy of Arts and Sciences who funded this project.
We acknowledge support of the publication fee by the CSIC Open Access Publication Support Initiative through its Unit of Information Resources for Research (URICI).
We would like to acknowledge support of the Department of Community Health Sciences, Aga Khan University, who helped us at every stage of the project.
ST acknowledges support of NSF grant DMS-1022758.
HM acknowledges support of the National Health and Medical Research Council of Australia: Career Development Fellowship (1016272).
We acknowledge support of the publication fee by Epigen project.
We also acknowledge support of the Hopkins Population Center, NIH Grant R24-HD042854.
MD and PMD acknowledge support of the University Technology Sydney and the transcription assistance of Ms Anne Wheeler.
We acknowledge support of the publication fee by the Open Access Publication Funds of Bielefeld University.
Dr Timmis acknowledges support of St Bartholomew's and the London Cardiovascular Biomedical Research Unit, funded by the National Institute for Health Research.
