1 deBelle Laboratory for Biochemical Genetics, McGill University-Montreal Children's Hospital Research Institute, Montreal, Quebec, Canada
In the article: A Filter Paper Sampling Method for the Uric Acid-Creatinine Ratio in Urine: Normal Values in the Newborn, Pediatrics, 49:80 (January) 1972, the last sentence of the Results section should read:
We were unable to obtain and test urine samples which had been collected during the first week of life from known patients with the Lesch-Nyhan Syndrome.