Roger B. Mason

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When the surgeon identifies an adenoma within the gland and selectively excises it, endocrine-active pituitary tumors are usually cured and pituitary function is preserved. Occasionally ectopic adenomas arise primarily in the pituitary stalk or arise superiorly in the midportion of the anterior lobe and extend upward within the stalk. To determine if these(More)
Purpose – This paper seeks to investigate the influence of the external environment on the choice of strategic management activities, from a chaos and complexity perspective, since a business environment is a complex adaptive system. Design/methodology/approach – The study in this paper was of an exploratory nature, using the qualitative techniques of case(More)
OBJECT Thrombolytic treatments for ischemic stroke can restore circulation, but reperfusion injury, mediated by oxygen free radicals, can limit their utility. The authors hypothesized that, during reperfusion, nitric oxide (NO) provides cytoprotection against oxygen free radical species. METHODS Levels of NO and oxygen free radicals were determined in(More)
Today's trend toward ambulatory medical care will bring more pharmacological problems into the dental office. While the dental management of patients taking oral anticoagulants is controversial, current research supports the contention that they can be safely treated on an outpatient basis. The use of the International Normalized Ratio (INR) has made better(More)
This paper examines engagement with an online discussion forum, aiming to identify the different levels of participation and to investigate factors that encourage or discourage student participation. The case involved the posing of a short real-life problem via a forum on the university’s virtual learning environment. An in-class survey was conducted to(More)
  • R B Mason
  • CMAJ : Canadian Medical Association journal…
  • 1996
Few opera buffs stop to consider how the illnesses suffered by opera's great heroes and heroines mirrored the medical treatments and public attitudes of their time. A Toronto physician and his wife, an English professor and literary critic, have written a book exploring how opera presents illnesses such as tuberculosis and syphilis.
A series of mono-, bi-, and tricyclic pyrimidines and as-triazines was prepared and their antiinflammatory activity measured against carrageenan-induced edema in the rat. The more active analogues (ED50), including 4-pyri-dylpyrimidines 4a (38), 4b (47), and 4g (49) and 2-hydroxypyrimidine 8r (43), were then tested against adjuvant-induced edema in the rat.(More)