“Immunoglobulin G Anti-Helicobacter Pylori by ELISA and Western-Blot in Patients of the Gastroenterology Service of Hospital San Vicente De Paul, Heredia”. Acta Médica Costarricense , vol. 42, no. 1, Mar. 2000, pp. 19-24, https://doi.org/10.51481/amc.v42i1.538.