“…Ross, 1950;Sobotka, Baker, and Frank, 1960;Bauer and Heinrich, 1961;Yavorkovsky and Mai, 1961;Gjersten and Schrumpf, 1962) but the control values we have found agree well with those of Herbert and Zalusky (1961), Worm-Petersen (1962), and Kidd, et al (1963). The finding of a correlation between B12 concentrations in serum and cerebrospinal fluid confirms the reports of Worm-Petersen (1962) and of Simpson (1964).…”