for this δ18O discrepancy. He suggested that a cleanser, which antiquities dealers and collectors often use to clean the artifacts to increase value, may have been the source of the low δ18O readings. He tested the most popular cleanser sold in Israel and confirmed that the δ18O value of the cleanser was consistent with the δ18O value of the patina in the inscription. A later study with a different isotope found that the δ13C values of the surface patina and the inscription patina were almost identical. In 2007, Finnish theologian Matti Myllykoski (Arto Matti Tuomas Myllykoski) summarised the current position thus: "The authenticity and significance of the ossuary has been defended by Shanks (2003), while some scholars—relying on convincing evidence, to say the least—strongly suspect that it is a modern forgery." In 2014, an archaeometric analysis by Amnon Rosenfeld, Howard Randall Feldman and Wolfgang Elisabeth Krumbein strengthened the authenticity contention of the ossuary. It found that patina on the ossuary surface matched that in the engravings, and that microfossils in the inscription seemed naturally deposited. Israeli investigation Limor Livnat, Israeli Minister of Culture, mandated the work of a scientific commission to study the suspicious finds. IAA began an investigation into the affair. The James Ossuary was authentic—albeit unusual in shape—but they claimed the inscription was a fake. However, in an external expert report, dated September 2005, Wolfgang E. Krumbein entered the controversy. His conclusions contradict those of the IAA stating "Our preliminary investigations cannot prove the authenticity of the three objects beyond any doubt. Doubtlessly the patina is continuous in many places throughout surface and lettering grooves in the case of ossuary and tablet. On the other hand a proof of forgery is not given by the experts nominated by the IAA." The Israeli Antiquities Authority has failed to offer any report explaining why it concluded the ossuary is a forgery. Unsurprisingly, international experts are unable to give their opinions on the ossuary's authenticity until the IAA allows scholars to review its findings. Edward John Keall, the Senior Curator at the Royal Ontario Museum (ROM), Near Eastern & Asian Civilizations Department, continues to argue for the ossuary's authenticity, saying "the ROM has always been open to questioning the ossuary's authenticity, but so far no definitive proof of forgery has yet been presented, in spite of the current claims being made." The Biblical Archaeology Review also continued to defend the ossuary.