Tan JS, Yan XX, Wu Y, Gao X, Xu XQ, Jiang X, Jia L, Hu S, Hua L, Wang XJ. Rare variants in MTHFR predispose to occurrence and recurrence of pulmonary embolism. Int J Cardiol. 2021 May 15;331():236–42. doi: 10.1016/j.ijcard.2021.01.073. PMID: 33571559.