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retention time. At the evaluated concentration of 5000 ␮g/L, prednisolone produced a signal equivalent to 20 ␮g/L cortisol, representing a 0.4% interference. Fenofi-brate generated parent ions at m/z 361 and 363 in an abundance ratio of 3:1, a distinctive pattern related to the presence of chlorine in the chemical composition. In MS/MS mode, fenofibrate(More)
BACKGROUND Neurological dysfunction is a key medical concern in professional sportsmen (PSM). We investigated whether saliva S100B concentrations in PSM and healthy controls are modified before and after training. METHODS We conducted a case-control-study in 75 patients (25 PSM vs 50 controls) in which S100B saliva concentrations were expressed as(More)
The plasma level profile of SA and SUA after a single oral dose of ASA was studied in 8 children with juvenile rheumatoid arthritis, aged 3.5-15.0 years. Pharmacokinetic parameters were on average similar to those reported in the literature for adult subjects, although a somewhat larger intersubject variability was found.
The majority of the published reference range data on catecholamines excretion by healthy children is incomplete and often contradictory (1). We assayed in the urines of 127 healthy children the values of the catecholamines (norepinephrine, epinephrine, dopamine) and their methylated metabolites (normetanephrine, metanephrine, 3-methoxytyramine) for the(More)
Neuroblastoma is the most common extracranial solid tumor in children. Abnormal secretion of catecholamines in tissues and body fluids allows for the differential diagnosis of neuroblastoma from other neoplasms and its distinction from non-neoplastic inflammatory diseases. This is achieved by assaying homovanillic acid and 4-hydroxy-3-methoxymandelic acid,(More)