sentences:  In 2011 The British Medical Journal ran articles over 3 weeks documenting his fraud and criticising The Lancet editor for delay in accepting evidence of fraud and withdrawing the publication.As is the case in the United States and many other countries, the mercury-based additive thimerosal, previously thought necessary for multi-dose vials of vaccines such as the DPT shot, has largely been phased out.According to the JCVI, it has been shown that the amount of mercury in the blood of children receiving thimerosal-containing vaccines is well below levels that may be "associated with any toxic effects."