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Fujiwara M, Nishiyama M, Yamamura I, Ohtsuki S, Nomura R. A sol-gel method using acetic anhydride in the presence of cholesterol in organic solution media: preparation of silicas that recognize steroid hormones. Anal Chem. 2004 Apr 15;76(8):2374–81. doi: 10.1021/ac035173w. PMID: 15080750. |