Where used:

Attribute	OBSERVATION DATE	references in description OBSERVATION DATE (SERUM CREATININE LEVEL)
Attribute	OBSERVATION TYPE	references in description OBSERVATION DATE (SERUM CREATININE LEVEL)
Data Element	DATE	references in description OBSERVATION DATE (SERUM CREATININE LEVEL)
Dataset	Summary Core Dataset for Diabetes	references in description OBSERVATION DATE (SERUM CREATININE LEVEL)