TY - JOUR AU - Shock, Nathan, W. AB - Article PDF first page preview Close This content is only available as a PDF. Author notes The authors wish to acknowledge valuable contributions to this work made by Dr. Dean Roberts in making available the subjects from the probability sample of the city of Baltimore, Miss Leida Luha for assistance in carrying out the microbiologic analyses, and Mrs. Ethel Biglen for assistance in scheduling tests for patients in the Baltimore City Hospitals Infirmary Division. © 1957 The Gerontological Society of America TI - Vitamin B12 Serum Concentrations in 528 Apparently Healthy Human Subjects of Ages 12-94 JF - Journal of Gerontology DO - 10.1093/geronj/12.1.32 DA - 1957-01-01 UR - https://www.deepdyve.com/lp/oxford-university-press/vitamin-b12-serum-concentrations-in-528-apparently-healthy-human-ZVI1vqZSb2 SP - 32 EP - 38 VL - 12 IS - 1 DP - DeepDyve ER -