Selenium levels in colorectal cancer: A systematic review and meta-analysis of serum, plasma, and colorectal specimens.

Pal, A; Dhar, A; Shamim, Ma; Rani, I; Negi, Rr; Sharma, A; Chatterjee, N; Shiv, S; Goyal, A; Kaur, B; Tondolo, V; Rongioletti, M; Samantaray, Sm; Hoque, M; Pawar, A; Goswami, K; Squitti, R