Santillo, D., Johnston, P. & Singhofen, A. (1999). Critique of the validation studies conducted to date of in vitro methods for determination of leaching rates of phthalates from PVC toys (conducted by TNO and LGC), and of the in vivo study underlying the validation of the Dutch methodology (as conducted by RIVM). Submitted to the EU Scientific Committee for Toxicity, Ecotoxicity and Environment. Greenpeace Research Laboratories Technical Note 02/99, September 1999.