The UK Medical Research Council (MRC), the Wellcome Trust and the University of Bristol currently provide core funding support for ALSPAC (WT092731). Data collection is funded from a wide range of sources, which are detailed on the ALSPAC website: http://www.bristol.ac.uk/alspac/participants/ethics/funding/. AB is funded by the Wellcome Trust (WT086118/Z/08/Z) and the MRC/Wellcome Trust strategic support. AF is funded by an MRC Research Fellowship (G0701594). DAL, AF and GDS work in a Centre that receives funding from the MRC (G0600705).