Abstract
BECAUSE of conflicting reports about the occurrence of urinary constituents yielding pink colours on chromato-grams when treated with ninhydrin followed by Ehrlich's reagent, we investigated these substances excreted by schizophrenic and other psychiatric patients using two extraction procedures in parallel.
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WATT, J., ASHCROFT, G., DALY, R. et al. Urine Volume and Pink Spots in Schizophrenia and Health. Nature 221, 971–972 (1969). https://doi.org/10.1038/221971a0
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DOI: https://doi.org/10.1038/221971a0
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