Published on in Vol 20, No 6 (2018): June
1 Centre for Quantitative Medicine, Duke University - National University of Singapore Medical School, Singapore, Singapore
2 Department of Statistics and Applied Probability, National University of Singapore, Singapore, Singapore
3 Department of Biostatistics and Bioinformatics, Duke University, Durham, NC, United States
4 Department of Health Behavior and Health Education, University of Michigan School of Public Health, Ann Arbor, MI, United States