These three main experimental types are used in animal studies, studies testing heritability and molecular genetics, and gene interaction/environment studies.
Multiple studies have found that housing hens in particularly close quarters, known as battery cages, may increase the likelihood of salmonella poisoning.
In comparative studies, trefentanil was slightly more potent and shorter acting than alfentanil as an analgesic, but induced significantly more severe respiratory depression.
Compulsive hoarding is associated in various studies with serious health risks such as household falls, obesity, respiratory problems (caused by dust mites and squalor) and poor medication compliance.