Table 1. Sample collections.
| Case Cohort | Number | Region of Origin |
| Virginia | 1,030 | North America, Europe* |
| Germany | 801 | North America, Europe* |
| Stanford VA | 55 | North America, Europe* |
| Total | 1,886 | |
| Control Cohort | ||
| 1958 UK Birth Cohort | 4,289 | UK |
| IT.NL.PL.SP | 3,609 | Italy, Netherlands, Poland, Spain |
| KORA | 980 | Germany |
| CCHMC | 794 | North America |
| Fr1 | 347 | France |
| Fr2 | 402 | France |
| Total | 10,421 |
*
Numbers of samples by country of origin are listed in the Methods section.
Case cohort names represent location of genotyping, and do not reflect country of origin of samples.