RT Journal Article SR Electronic T1 Thyroid hormone replacement in the preconception period and pregnancy JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 282 OP 283 DO 10.3399/bjgp19X703805 VO 69 IS 683 A1 Anh Tran A1 Steve Hyer A1 Imran Rafi A1 Onyebuchi Okosieme YR 2019 UL http://bjgp.org/content/69/683/282.abstract AB