Roosita K, Martopuro RS, Djuwita I, Damanik MR, Kusharto CM, Tani F. Biological Response of Epithelial Cells line (CMT-93) Induced by β-Carotene. Pak. J. Nutr. 2013;12(7):615–619. doi:10.3923/pjn.2013.615.619