Since the 19th century, only those with a<unk> ical degree have been considered worthy to practice<unk> . Clinicians (licensed professionals who deal with patients) can be physicians, physical therapists, physician assistants, nurses or others. The<unk> ical profession is the social and occupational structure of the group of people formally trained and authorized to apply<unk> ical knowledge. Many countries and legal jurisdictions have legal limitations on who may practice<unk> .<unk>  comprises various specialized sub-branches, such as cardiology, pulmonology, neurology, or other fields such as sports<unk> , research or public health.
Human societies have had various different systems of health care practice since at least the beginning of recorded history.<unk> , in the modern period, is the mainstream scientific tradition which developed in the Western world since the early Renaissance (around 1450). Many other traditions of health care are still practiced throughout the world; most of these are separate from Western<unk> , which is also called biomedicine, allopathic<unk>  or the Hippocratic tradition. The most highly developed of these are traditional Chinese<unk> , Traditional Tibetan<unk>  and the Ayurvedic traditions of India and Sri Lanka. Various non-mainstream traditions of health care have also developed in the Western world. These systems are sometimes considered companions to Hippocratic<unk> , and sometimes are seen as competition to the Western tradition. Few of them have any scientific confirmation of their tenets, because if they did they would be brought into the fold of Western<unk> .<unk> " is also often used amongst<unk> ical professionals as shorthand for internal<unk> . Veterinary<unk>  is the practice of health care in animal species other than human beings.
Medicine
Electron
Organic chemistry
Sports medicine
Wart
Obstetrics
Keloid
Neuroscience