Lee-Guzman, C., Guzman, M., Ghahramani, E., Johnson, T., Thakur, V., & Canton, D. (2011). A study of the prevalence of vitamin B12 deficiency in Turlock, California. Osteopathic Family Physician, 3(5), 195–201. Retrieved from https://ofpjournal.com/index.php/ofp/article/view/220