Rastogi, Munish, et al. “A Comparative Study of Stool Antigen Immunocard STAT HpSA Test With Biopsy in Diagnosis of H Pylori Infection”. Indian Journal of Community Health, vol. 27, no. 4, Dec. 2015, pp. 435-7, http://iapsmupuk.org/journal/index.php/IJCH/article/view/599.