Gutterman D F, Correa E I, DePaulo J R, Coyle J T
Am J Psychiatry. 1985 Apr;142(4):493-5. doi: 10.1176/ajp.142.4.493.
The authors measured RBC choline level, plasma choline level, and renal concentrating ability in 26 lithium-treated patients, seven psychiatric control subjects, and seven normal control subjects. An analysis of variance revealed no significant relationship between renal concentrating ability and either RBC choline level or RBC/plasma choline ratio.