All medical researches concentrate primarily on advances of medical knowledge and strategies for prevention, diagnosis and treatment of diseases. However, since most of the medical researches are being carried out on human subjects, they often pose ethical problems. Clinical investigations from which the human subjects involved may not derive any personal benefits include studies of physiological function in health or disease, investigations of new drugs, and the trial of new procedures. This paper discusses the ethical problems associated with medical researches, especially clinical investigations involving human subjects directly or indirectly. One general principle that has been wildly accepted is that patients or volunteers involved in the clinical investigations should be fully informed about the experiment in which they participate. However, ethical problems in those clinical investigations should be evaluated by the three major biomedical ethical principles, or the principle of autonomy, the principle of beneficence, and the principle of justice. This paper also presents the 'Helsinki Declaration' advocated by the World Medical Association in 1964 and revised thereafter several times as a practical guideline for the ethics of medical research.
Beneficence ; Diagnosis ; Ethics* ; Helsinki Declaration ; Humans ; Social Justice ; Volunteers

No abstract available.
Education, Medical* ; Humans ; Students, Medical*

No Abstract Available.
Helicobacter pylori* ; Helicobacter*

No Abstract Available.
Helicobacter pylori* ; Helicobacter*

No abstract available.
Accreditation* ; Schools, Medical*

Careful history taking, clinical course of the disease, and neurological examination are mandatory to differentiate cerebrovascular disease from other neurological diseases or even from non-neurological diseases. Cerebrovascular diseases can be classified as ischemic stroke and hemorrhagic stroke. More specified classification of ischemic stroke according to the presumptive ischemic mechanism may be helpful to the treatment and secondary prevention. The unique clinical characteristics of ischemic stroke of different subtypes and diagnostic tests are described.
Cerebrovascular Disorders* ; Classification ; Diagnosis* ; Diagnostic Tests, Routine ; Neurologic Examination ; Secondary Prevention ; Stroke

No abstract available.
Helicobacter pylori* ; Helicobacter*

No abstract available.
Pneumothorax*

No abstract available.
Coronary Disease*

No abstract available.
Adult* ; Case-Control Studies* ; Humans ; Risk Factors*