Citation:Juhl G, Larson GM, Mullins R, Bond S, Polk HC Jr 1990
"1990-Mar-Apr" contains a sequence that could not be interpreted against an available match matrix for date components.
Juhl G, Larson GM, Mullins R, Bond S, Polk HC Jr. Six-year results of annual colonoscopy after resection of colorectal cancer. World J Surg ;14(2):255-60; discussion 260-1 Available from: http://www.ncbi.nlm.nih.gov/pubmed/2327099.