Heikinheimo R J, Haavisto M V, Harju E J, Inkovaara J A, Kaarela R H, Kolho L A, Rajala S A
Geriatric Department, Tampere City Hospital, Finland.
Calcif Tissue Int. 1991;49 Suppl:S87. doi: 10.1007/BF02555102.
An annual intramuscular injection of ergocalciferol (150,000 IU) normalized low serum (25(OH)D concentrations in elderly people for 1 year. The treatment had a slight effect on serum 24,25(OH)2D levels but no effect on 1,25(OH)2D levels.