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<div class="articletext">The Center for Science in the Public Interest (CSPI) Monday asked the Bush Administration's chief ethics officer to tighten up conflict of interest rules for members of scientific advisory bodies. CSPI's 17-page letter to Amy L. Comstock, director of the US Office of Government Ethics, was prompted by months of protest over the alleged ideological loading of committees that advise the government on science policy, said Virginia Sharpe, director of CSPI's Integrity in Science proj