Have you tried speaking to the NPIS (National Poisons Information Service) - they've done a follow-up study on the health effects associated with exposure to laudry detergents. They do have information on their website (TOXBASE) too ttp://www.toxbase.org/
The US Poison Control Centres are looking into this too; http://www.ncbi.nlm.nih.gov/pubmed/22845559
The NPIS study is large and there are no long term sequelae reported (the citation in Stacey's response is not correct - see Williams, H. et al., 2014. Reported toxicity in 1486 liquid detergent capsule exposures to the UK National Poisons Information Service 2009-2012, including their ophthalmic and CNS effects. Clinical toxicology (Philadelphia, Pa.), 52(2), pp.136–40. Available at: http://www.ncbi.nlm.nih.gov/pubmed/24199643 doi: 10.3109/15563650.2013.855315). The most likely serious sequelae are corneal injury (Horgan N , McLoone E , Lannigan B , Flitcroft I . Eye injuries in children: a new household risk . Lancet 2005 ; 366 : 547 – 548 and Mathew, R.G., Kennedy, K. & Corbett, M.C., 2010. Eyes and alkalis. Wave of paediatric eye injuries from liquid detergent capsules. BMJ (Clinical research ed.), 340, p.c1186. Available at: http://www.ncbi.nlm.nih.gov/pubmed/20197325).