[Evaluation of testosterone levels through distinct analytic methods in healthy men].

Unlabelled: Plasma testosterone concentrations are essential for the diagnosis of several causes of hypogonadism, including late-onset hypogonadism. Defining the normal range for testosterone concentrations poses certain difficulties due to the changes that occur with age and the variability of the different analytical methods used.

Objectives: To study normal ranges of testosterone in healthy young men and to compare the results of distinct analytical methods.

[Biological differences on onset among type 1A diabetics in relation to HLA-DQ genetic markers].

Background And Objective: The hypothesis that diabetes mellitus presentation partially depends on the genetic characteristics of the patient has been proposed. Up to date this kind of studies have been made by serology, so there are no data about the role played by DQ haplotypes in the presentation and clinical importance of DM1. This fact is analysed in the present study.