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. 2020 Feb 4;34(12):1111–1117. doi: 10.1007/s10654-020-00604-9

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© The Author(s) 2020

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Fig. 3 — Approximate sample sizes of some of the major prospective cohort studies on a log scale. BD = British Doctors study, NHS = Nurses Health Study, NHS2 = Nurses Health Study 2, HPFS = Health Professionals Study, EPIC = European Prospective Investigation into Cancer and Nutrition, AARP = American Association of Retired Persons Diet and Health study, MW = Million Women Study, CKB = China Kadhoorie Biobank, UKB = UK Biobank, AOU = All of Us Research Program (proposed sample size)