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Headaches in children, adolescents and adults are quite common. The study and characterization of childhood headaches, however, entered an era of increased interest with the adoption of the first edition of the International Classification of Headache Disorders [1]. The initial description of headaches in humans is quite old. Ancient writings in an epic poem from the Sumerian area dating back t...

A HIGH incidence of phosphate urinary calculi in sheep has been associated with the feeding of rations containing dibasic potassium phosphate (Lindley et al., 1953; Elam et al., 1956, 1957). Further, Lindley et al. (1953) observed elevated plasma phosphorus levels under these conditions. Emerick et al. (1959) observed high plasma phosphorus levels in lambs subsequently afflicted with urinary mi...

Preincubation of pulmonary microvascular endothelial cells (PMVECs) with platelet-activating factor (PAF) for 3.5 h increased the adhesion rate of polymorphonuclear leukocytes (PMNs) to PMVECs from 57.3% to 72.8% (p < 0.01). Preincubation of PMNs with PAF also increased PMN-PMVEC adhesion rate. All-trans retinoic acid (RA) blocked the adherence of untreated PMNs to PAF-pretreated PMVECs but not...