1. Department of Biostatistics, and
2. Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, Washington, USA
3. Institute of Health and Environment, Seoul National University, Seoul, Korea
4. Department of Statistics, University of Washington, Seattle, Washington, USA
5. Core for Biomedical Statistics, Seattle Children’s Hospital, Seattle, Washington, USA
6. Centre for Mathematical Science, Lund University, Lund, Sweden