https://www.mid-day.com/lifestyle/health-and-fitness/article/twin-studies-report-global-rise-in-gastrointestinal-cancers-among-middle-aged-adults-23585455
The first study, published in JAMA, showed that the surging cancer cases go beyond colorectal, and include gastric, oesophageal, and pancreatic
twin studiesreportglobalrisegastrointestinal
https://newatlas.com/mental-health/depression-fruit-vegetable-twins/
Using data from twin studies conducted over many years, researchers have found a link between levels of depression and the amount of fruit and vegetables...
twin studieshow muchdepressionfruitvegetables