Serum 25-Hydroxyvitamin D Levels and Risk of Colorectal Cancer: An Age-Stratified Analysis

Yejin Kim, Yoosoo Chang, Yoosun Cho, Jiwon Chang, Kyungeun Kim, Dong Il Park, Soo‐Kyung Park, Hee‐Kyung Joh, Mi Kyung Kim, Chanmin Kim, Sarah H. Wild, Christopher D. Byrne, Seungho Ryu