Authors: J Rosing; S Middeldorp; J Curvers; M Christella; L G Thomassen; G A Nicolaes; J C Meijers; B N Bouma; H R Büller; M H Prins; G Tans Journal: Lancet Date: 1999-12-11 Impact factor: 79.321
Authors: Katrina M Wyatt; Paul W Dimmock; Martin Frischer; Paul W Jones; Shaugn PM O'Brien Journal: BMC Womens Health Date: 2002-06-19 Impact factor: 2.809