<unk>  was the name given by proponents in the 1960s to a claim that exposure to low levels of certain chemical agents harm susceptible people, causing multiple chemical sensitivity and other disorders.<unk> sts are people that support and promote this offshoot of conventional medicine. They often have a background in the field of allergy or otorhinolaryngology, and the theoretical approach is derived in part from classic concepts of allergic responses, first articulated by Theron Randolph and developed by Richard Mackarness.<unk> sts support a cause-and-effect relationships for non-specific symptoms reported by some people after low-dose exposure to chemical, biologic, or physical agents. This pattern of low-dose reaction is not generally accepted by toxicologists. Although some of the mainstream medical community continue to reject these claims, the concept is gaining some recognition under the modern and more clearly articulated classification of environmental medicine.
Clinical ecology
Clinical epidemiology
Test panel
Diagnosis-related group
Animal testing
Acoustic epidemiology
Waterborne Disease and Outbreak Reporting System
Disease ecology