Saavedra, Miguel A., et al. “Maternal and Fetal Outcome in Mexican Women With Rheumatoid Arthritis”. Revista Médica Del Instituto Mexicano Del Seguro Social, vol. 53, no. Supl 1, May 2015, pp. s24-s29, https://revistamedica.imss.gob.mx/index.php/revista_medica/article/view/50.