Answers are grounded in this paper and cite their sources.
Pribram in 1871 postulated that some part of the serum calcium was bound to the serum proteins.Rona & Takahashi (1911) produced experimental evidence justifying Pribram's suggestion.
No takes yet. Share an insight, caveat, or question.
Martin et al. (1950) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: