Folic acid supplementation and risk of colorectal neoplasia during long-term follow-up of a randomized clinical trial. - Passarelli MN; Barry EL; Rees JR; Mott LA; Zhang D; Ahnen DJ; Bresalier RS; Haile RW; McKeown-Eyssen G; Snover DC; Cole BF; Baron JA (The American journal of clinical nutrition, 2019)