Authors: Brenda J Wilson; M Stuart Watson; Gordon J Prescott; Sarah Sunderland; Doris M Campbell; Philip Hannaford; W Cairns S Smith Journal: BMJ Date: 2003-04-19
Authors: L Brouwers; A J van der Meiden-van Roest; C Savelkoul; T E Vogelvang; A T Lely; A Franx; B B van Rijn Journal: BJOG Date: 2018-08-10 Impact factor: 6.531