Karjalainen J, Ojala K
Klin Wochenschr. 1975 Jul 15;53(14):685-6. doi: 10.1007/BF01469298.
Serum lanatoside C concentrations were measured by radioimmunoassay in 56 patients on oral maintenance therapy. Seven patients were judged to have digitalis toxicity and the lanatoside C concentration in this group was 6.99+/-2.00 ng/ml (mean +/-1 SD). 49 patients were non-toxic and the mean serum lanatoside C concentration in this group corresponded to 2.32+/-1.08 ng/ml.