reference site study_type omega_AR standardized_calcification_anom Iguchi_et_al._2012 Japan Laboratory 1 -1.25 Iguchi_et_al._2012 Japan Laboratory 1 -1.12 Iguchi_et_al._2012 Japan Laboratory 1 -0.41 Iguchi_et_al._2012 Japan Laboratory 1.5 -0.51 Iguchi_et_al._2012 Japan Laboratory 1.5 -0.44 Iguchi_et_al._2012 Japan Laboratory 1.5 0.87 Iguchi_et_al._2012 Japan Laboratory 3.5 0.46 Iguchi_et_al._2012 Japan Laboratory 3.5 0.62 Iguchi_et_al._2012 Japan Laboratory 3.5 1.79