Basol N, Karakus N, Savas AY, Kaya I, Karakus K, Yigit S. The importance of MTHFR C677T/A1298C combined polymorphisms in pulmonary embolism in Turkish population. Medicina (Kaunas). 2016;52(1):35–40. doi: 10.1016/j.medici.2016.01.003. PMID: 26987498.