1. Aalen OO, Røysland K, Gran JM, Kouyos R, Lange T. Can we believe the DAGs? A comment on the relationship between causal DAGs and mechanisms. Stat Meth Med Res. 2016;25(5):2294–314.
2. Altman DG, Machin D, Bryant TN, Gardner MJ, editors. Statistics with Confidence. 2nd ed. London: BMJ Books; 2000.
3. Baggerly K, Gunsalus CK. Penalty too light. Cancer Letter. 2015;41(42):1–9.
4. Bancroft TW, Han CP. Inference based on conditional specification. Int Stat Rev. 1977;45:117–28.
5. Belluz J, Plumer B, Resnick B. The 7 biggest problems facing science, according to 270 scientists. Vox, September 7, 2016, accessed Oct. 16, 2016 from http://www.vox.com/2016/7/14/12016710/science-challeges-research-funding-peer-review-process