PT - JOURNAL ARTICLE AU - Imran Rafi AU - Melissa Hill AU - Judith Hayward AU - Lyn S Chitty TI - Non-invasive prenatal testing: use of cell-free fetal DNA in Down syndrome screening AID - 10.3399/bjgp17X691625 DP - 2017 Jul 01 TA - British Journal of General Practice PG - 298--299 VI - 67 IP - 660 4099 - http://bjgp.org/content/67/660/298.short 4100 - http://bjgp.org/content/67/660/298.full SO - Br J Gen Pract2017 Jul 01; 67