Author ' s response to reviews Title : A Round Robin Approach to the Analysis of Bisphenol A ( BPA ) in Human

Laura N Vandenberg (lvandenberg@schoolph.umass.edu) Roy R Gerona (roy.gerona@ucsf.edu) Kurunthachalam Kannan (kkannan@wadsworth.org) Julia A Taylor (TaylorJA@missouri.edu) Richard B van Breeman (breemen@uic.edu) Carrie A Dickenson (dickensona@obgyn.ucsf.edu) Chuynyan Liao (cxl12@health.state.ny.us) Yang Yuan (yuanyang0819@gmail.com) Retha R Newbold (newbold1@niehs.nih.gov) Vasantha Padmanabhan (vasantha@med.umich.edu) Frederick S vom Saal (vomsaalf@missouri.edu) Tracey J Woodruff (woodrufft@obgyn.ucsf.edu)