1. Department of Biomedical Data Science, Geisel School of Medicine; Dartmouth College; Hanover NH 03755 USA
2. Department of Preventive Medicine; Northwestern University; Chicago IL 60611 USA
3. Department of Psychiatry, Geisel School of Medicine; Dartmouth College; Hanover NH 03755 USA
4. Biogen; 225 Binney St Cambridge MA 02142 USA
5. Department of Mathematics and Statistics; University of Vermont; Burlington VT 05405 USA
6. Discipline of Palliative and Supportive Services; Flinders University; Bedford Park SA 5042 Australia
7. School of Nursing; The University of Alabama at Birmingham; Birmingham AL 35233 USA