Low urinary 6-sulphatoxymelatonin concentrations in acute migraine.
Masruha MR, de Souza Vieira DS, Minett TS, Cipolla-Neto J, Zukerman E, Vilanova LC, Peres MF. Low urinary 6-sulphatoxymelatonin concentrations in acute migraine. J Headache Pain. 2008 Aug; 9(4):221-4.