The claim states that a quantifiable number of paper abstracts are read when preparing a clinical systematic review. All selected papers demonstrate this by explicitly stating the exact number of records or abstracts screened in various clinical systematic reviews (e.g., 1,381 and 3,146 in Paper 0; 82,346 in Paper 2; 1,873 in Paper 3; 505 in Paper 6; and 15,307 in Paper 10). There is no contradictory evidence in the provided literature.