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In the May 30 issue of The Journal (237:2380, 1977), reference 4 of the letter "Mass Screening for Colorectal Cancer—A Negative Report" should read as follows: Stroehlein JR, Fairbanks VF, Go VLW, et al: Hemoccult stool tests: False-negative results due to storage of specimens. Mayo Clin Proc 51:548-552, 1976.
Hemoccult Test Reference. JAMA. 1977;238(16):1723. doi:10.1001/jama.1977.03280170017016