Erythrocyte folate does not accurately reflect folate status in sickle cell disease.

bladder washings of patients with recurrent urothelial cell carcinomas [Technical Brief]. Clin Chem 2000;46:2003–7. 5. de Kok JB, Zendman AJ, van de Locht LT, Ruers TJM, van Muijen GN, Mensink E, Swinkels DW. Real-time hTERT quantification: a promising telomerase-associated tumor marker. Lab Invest 1999;79:911–2. 6. Dalbagni G, Han W, Zhang ZF, Cordon CC, Saigo P, Fair WR, et al. Evaluation of the telomeric repeat amplification protocol (TRAP) assay for telomerase as a diagnostic modality in recurrent bladder cancer. Clin Cancer Res 1997;3:1593–8. 7. Heine B, Hummel M, Muller M, Heicappell R, Miller K, Stein H. Non-radioactive measurement of telomerase activity in human bladder cancer, bladder washings, and in urine. J Pathol 1998; 184:71–6. 8. Kavaler E, Landman J, Chang YL, Droller MJ, Liu BCS. Detecting human bladder carcinoma cells in voided urine samples by assaying for the presence of telomerase activity. Cancer 1998; 82:708–14. 9. Kinoshita H, Ogawa O, Kakehi Y, Mishina M, Mitsumori K, Itoh N, et al. Detection of telomerase activity in exfoliated cells in urine from patients with bladder cancer. J Natl Cancer Inst 1997;89:724–30. 10. Hiyama K, Hirai Y, Kyoizumi S, Akiyama M, Hiyama E, Piatyszek MA, et al. Activation of telomerase in human lymphocytes and hematopoietic progenitor cells. J Immunol 1995; 155:3711–5.