Task: Answer Verification
Input (English): Question: Does progressive periodontal disease have a simultaneous incremental elevation of gingival crevicular fluid and serum CRP levels?
Answer: C-reactive protein levels in gingival crevicular fluid and serum increased proportionately with the severity of periodontal disease. They correlated positively with clinical parameters, including gingival index, probing pocket depth, and clinical attachment level. Thus, it can be considered as a periodontal inflammatory biomarker and deserves further consideration.
Output (English): yes