PTH and chronic kidney disease: In each diagram, area A represents the proportion of respondents who identified the condition as a complication of CKD, area B indicates the proportion of respondents screening for the condition in stage 3 CKD or earlier, and area C shows the proportion of respondents who started therapy or asked for a consult at a Hgb < 11 g/dl or a PTH >70 ng/ml, respectively.