TY - GEN AU - Young,G P AU - St John,D J TI - Screening for colorectal cancer: the accuracy of fecal occult blood SN - 0098-7484 PY - 1993///0805 KW - Colorectal Neoplasms KW - prevention & control KW - Humans KW - Mass Screening KW - Occult Blood KW - Reagent Kits, Diagnostic KW - Sensitivity and Specificity N1 - Publication Type: Comment; Letter ER -