A reversed phase high performance liquid chromatography approach in determining total red blood cell concentrations of 6‐thioguanine, 6‐mercaptopurine, methylthioguanine, and methylmercaptopurine in a patient receiving thiopurine therapyGary R. Erdmann, Daniel M. Canafax, Laura A. France et al.|Biomedical Chromatography|1990Cited by 67