To instill confidence in the public regarding the investigation process, it is essential that an investigating agency be independent and free from any conflicts of interest when conducting an investigation. As such, the TSB is an independent agency, separate from other Canadian government agencies and departments. TSB final reports and safety communications are not subject to government revisio...

Tuberculosis (TB) is an ancient disease that has affected mankind for more than 4,000 years (1). It is a chronic disease caused by the bacillus Mycobacterium tuberculosis and spreads from person to person through air. TB usually affects the lungs but it can also affect other parts of the body, such as brain, intestines, kidneys, or the spine. Symptoms of TB depend on where in the body the TB ba...

Given a positive integer p, we develop a method to construct difference equations of order greater than or equal to 2 such that all solutions of which are periodic of the same period p. The method of construction is based on a class of symmetric functions that we call “isovertible” functions. © 2005 Elsevier Ltd. All rights reserved. MSC: 39A10

Twenty years ago, and still in some textbooks, allergy was regarded as a Bdisease of the rich,^ with a rising prevalence only in industrialized or western countries. This has changed: allergy has become a major health problem in almost all countries of the world, both in terms of individual suffering, medical management, and quality of life, as well as a socioeconomic burden. People in Papua Ne...

Drawing on an in-depth analysis of eight global health networks, a recent essay in this journal argued that global health networks face four challenges to their effectiveness: problem definition, positioning, coalition-building, and governance. While sharing the argument of the essay concerned, in this commentary, we argue that these analytical concepts can be used to explicate a concept that h...